The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A125353 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A125353

Number of base 16 circular n-digit numbers with adjacent digits differing by 4 or less.
(history; published version)

#7 by Russ Cox at Sat Mar 31 12:35:02 EDT 2012

AUTHOR

_R. H. Hardin (rhhardin(AT)att.net), _, Dec 28 2006

Discussion

Sat Mar 31

12:35

OEIS Server: https://oeis.org/edit/global/875

#6 by Charles R Greathouse IV at Mon Nov 15 23:04:04 EST 2010

STATUS

proposed

approved

#5 by Charles R Greathouse IV at Mon Nov 15 23:04:02 EST 2010

KEYWORD

nonn,base,new

STATUS

approved

proposed

#4 by N. J. A. Sloane at Sat Oct 02 03:00:00 EDT 2010

KEYWORD

nonn,new

nonn

AUTHOR

Ron R. H. Hardin (rhhardin(AT)att.net), Dec 28 2006

#3 by N. J. A. Sloane at Fri Jan 09 03:00:00 EST 2009

KEYWORD

nonn,new

nonn

AUTHOR

Ron Hardin (rhhrhhardin(AT)cadenceatt.comnet), Dec 28 2006

#2 by N. J. A. Sloane at Sat Nov 10 03:00:00 EST 2007

COMMENTS

[empiricalEmpirical] a(base,n)=a(base-1,n)+A025014(n+1) for base>=4.int(n/2)+1

KEYWORD

nonn,new

nonn

#1 by N. J. A. Sloane at Fri Jan 12 03:00:00 EST 2007

NAME

Number of base 16 circular n-digit numbers with adjacent digits differing by 4 or less.

DATA

1, 16, 124, 796, 5924, 44916, 348652, 2743036, 21801764, 174565444, 1405459324, 11362215276, 92138276228, 748875775404, 6097017988948, 49701864868956, 405539673414148, 3311264043438796, 27050524930821556, 221065493126829404

OFFSET

0,2

COMMENTS

[empirical] a(base,n)=a(base-1,n)+A025014(n+1) for base>=4.int(n/2)+1

PROG

(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>4)+($[(i+1)mod N]`-$[i]`>4))

KEYWORD

nonn

AUTHOR

Ron Hardin (rhh(AT)cadence.com), Dec 28 2006

STATUS

approved