The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A307257

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A307257

Numbers k such that k is the substring identical to the most significant digits of its base-6 representation.
(history; published version)

#16 by N. J. A. Sloane at Wed Apr 10 22:29:13 EDT 2019

STATUS

proposed

approved

#15 by Jon E. Schoenfield at Mon Apr 08 21:36:06 EDT 2019

STATUS

editing

proposed

#14 by Jon E. Schoenfield at Mon Apr 08 21:36:03 EDT 2019

NAME

Numbers n k such that n k is the substring identical to the most significant digits of its base -6 representation.

COMMENTS

Numbers k whose base-6 representation begins with the same digits as n k itself.

EXAMPLE

155133423353 decimal _10 = 155133423353145 in base _6, which also begins with '155133423353'.

STATUS

proposed

editing

#13 by Michel Marcus at Mon Apr 08 07:12:31 EDT 2019

STATUS

editing

proposed

#12 by Michel Marcus at Mon Apr 08 07:12:15 EDT 2019

DATA

0, 1, 2, 3, 4, 5, 155133423353, 1535554025003332541, 1541322512150022100, 14544222532144144105400055, 15313352033401001032012412, 144510301032554451200342301123415, 145033105231511102401034455341005, 152142233320210504134120425450055, 1435322205115414041210434301130104431115, 1440543423354422011521421501514353012054

#11 by Michel Marcus at Mon Apr 08 07:11:39 EDT 2019

PROG

(PARI) isok(n) = my(vb=digits(n, 6), vd=digits(n)); vd == vector(#vd, k, vb[k]); \\ Michel Marcus, Apr 08 2019

STATUS

proposed

editing

#10 by Scott R. Shannon at Mon Apr 08 06:45:27 EDT 2019

STATUS

editing

proposed

#9 by Scott R. Shannon at Mon Apr 08 06:45:24 EDT 2019

NAME

Numbers n such that n is the substring identical to the most significant bits digits of its base 6 representation.

STATUS

proposed

editing

#8 by Scott R. Shannon at Mon Apr 01 08:24:33 EDT 2019

STATUS

editing

proposed

Discussion

Mon Apr 01

08:48

Michel Marcus: please next time, wait till sequence is approved before adding a bfile

#7 by Scott R. Shannon at Mon Apr 01 08:24:30 EDT 2019

EXAMPLE

155133423353 decimal = 155133423353145 in base 6, which also begins with '155133423353'.

STATUS

proposed

editing