The On-Line Encyclopedia of Integer Sequences (OEIS)

A160946 revision #18

A160946

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

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

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OFFSET

1,1

COMMENTS

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

For n>0, 10^n-1 is a term (that is, A002283 except 0). - Michel Marcus, Nov 25 2014

LINKS

Table of n, a(n) for n=1..31.

MAPLE

with(numtheory): T:=proc(w) local x, y, z; x:=0; y:=w;

for z from 1 to ilog10(w)+1 do x:=10*x+(y mod 10); y:=trunc(y/10); od; x; end;

P:=proc(q) local n; for n from 1 to q do if type(n/T(n+1), integer)

then print(n); fi; od; end: P(10^9); # Paolo P. Lava, Nov 24 2014

PROG

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

CROSSREFS

Sequence in context: A116274 A116286 A306449 * A359078 A100681 A043044

Adjacent sequences: A160943 A160944 A160945 * A160947 A160948 A160949

KEYWORD

nonn,base

AUTHOR

Claudio Meller, May 30 2009

EXTENSIONS

More terms from Claudio Meller, Jun 19 2009

a(24) - a(31) from Paolo P. Lava, Nov 24 2014

STATUS

approved