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A126410 Number of base 23 n-digit numbers with adjacent digits differing by two or less. 3
1, 23, 109, 525, 2543, 12361, 60223, 293899, 1436105, 7024405, 34386235, 168441635, 825574805, 4048257077, 19858855181, 97451838245, 478360096877, 2348721744139, 11534669029037, 56658230250101, 278351957108055 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

[Empirical] a(base,n)=a(base-1,n)+5^(n-1) for base>=2n-1; a(base,n)=a(base-1,n)+5^(n-1)-2 when base=2n-2

LINKS

Table of n, a(n) for n=0..20.

PROG

(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-2](($[i]`-$[i+1]`>2)+($[i+1]`-$[i]`>2))

CROSSREFS

Cf. Base 23 differing by one or less A126377.

Sequence in context: A157607 A142272 A124951 * A260986 A071634 A234252

Adjacent sequences:  A126407 A126408 A126409 * A126411 A126412 A126413

KEYWORD

nonn,base

AUTHOR

R. H. Hardin, Dec 28 2006

STATUS

approved

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Last modified July 4 14:51 EDT 2020. Contains 335448 sequences. (Running on oeis4.)