The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A160946

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A160946

Numbers n that are multiples of the reversal of n+1.
(history; published version)

#14 by Paolo P. Lava at Tue Nov 25 02:08:57 EST 2014

DATA

9, 99, 741, 979, 999, 9499, 9999, 99999, 319999, 749509, 771999, 999999, 1240099, 3522999, 3794109, 7099999, 7425741, 9801979, 9998899, 9999999, 10870209, 19789119, 30099999, 73378209, 75199999, 99999999, 326599999, 726199999, 728739999, 783742161, 969999999

EXTENSIONS

a(24) - a(2631) from Paolo P. Lava, Nov 24 2014

STATUS

proposed

editing

Discussion

Tue Nov 25

02:12

Paolo P. Lava: Now the entries take almost 260 characters... (then 970999999, 990980089, 999999999, etc.)
Yes, the sequence is surely infinite. You can add a comment.

#13 by Michel Marcus at Mon Nov 24 11:03:33 EST 2014

STATUS

editing

proposed

#12 by Michel Marcus at Mon Nov 24 11:00:37 EST 2014

PROG

(PARI) isok(n) = ! (n % subst(Polrev(digits(n+1)), x, 10)); \\ Michel Marcus, Nov 24 2014

STATUS

proposed

editing

Discussion

Mon Nov 24

11:03

Michel Marcus: For n>0, 10^n-1 is a term (so A002283 except 0).
So can say sequence is infinite, yes ?

#11 by Wesley Ivan Hurt at Mon Nov 24 10:54:58 EST 2014

STATUS

editing

proposed

#10 by Wesley Ivan Hurt at Mon Nov 24 10:54:45 EST 2014

NAME

Numbers n that are multiples of the reversal of n+1.

COMMENTS

741 = 3 * R(742) = 3 * 247.

STATUS

proposed

editing

#9 by Paolo P. Lava at Mon Nov 24 10:40:38 EST 2014

STATUS

editing

proposed

Discussion

Mon Nov 24

10:49

Michel Marcus: oh, there was a hole !
thanks

#8 by Paolo P. Lava at Mon Nov 24 10:34:43 EST 2014

DATA

EXTENSIONS

a(24) - a(2526) from Paolo P. Lava, Nov 24 2014

#7 by Paolo P. Lava at Mon Nov 24 09:12:44 EST 2014

DATA

9, 99, 741, 979, 999, 9499, 9999, 99999, 319999, 749509, 771999, 999999, 1240099, 3522999, 3794109, 7099999, 7425741, 9801979, 9998899, 9999999, 10870209, 19789119, 30099999, 73378209, 75199999

EXTENSIONS

a(24) - a(25) from Paolo P. Lava, Nov 24 2014

STATUS

proposed

editing

#6 by Michel Marcus at Mon Nov 24 05:23:40 EST 2014

STATUS

editing

proposed

Discussion

Mon Nov 24

05:24

Michel Marcus: Paolo, you think you can add a few more terms to get 3 data lines ?

05:30

Paolo P. Lava: Ok, I'll try

#5 by Michel Marcus at Mon Nov 24 05:23:36 EST 2014

COMMENTS

741= 3 * R(742)= 3 * 247.

STATUS

proposed

editing