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A126491 Number of base 23 n-digit numbers with adjacent digits differing by three or less. 2
1, 23, 149, 987, 6589, 44191, 297261, 2003755, 13527217, 91424701, 618430417, 4186027957, 28348547453, 192055244309, 1301515597555, 8822073211457, 59809085903049, 405528485035889, 2749918380375081, 18648854413662219 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

[Empirical] a(base,n)=a(base-1,n)+7^(n-1) for base>=3n-2; a(base,n)=a(base-1,n)+7^(n-1)-2 when base=3n-3

LINKS

Table of n, a(n) for n=0..19.

PROG

(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-2](($[i]`-$[i+1]`>3)+($[i+1]`-$[i]`>3))

CROSSREFS

Cf. Base 23 differing by two or less A126410, one or less A126377.

Sequence in context: A231207 A142902 A125333 * A142044 A142935 A037068

Adjacent sequences:  A126488 A126489 A126490 * A126492 A126493 A126494

KEYWORD

nonn,base

AUTHOR

R. H. Hardin, Dec 27 2006

STATUS

approved

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Last modified October 4 21:22 EDT 2022. Contains 357240 sequences. (Running on oeis4.)