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A126490 Number of base 22 n-digit numbers with adjacent digits differing by three or less. 2
1, 22, 142, 938, 6246, 41790, 280454, 1886106, 12703674, 85659918, 578078344, 3903599690, 26372153784, 178228449190, 1204818513176, 8146123490970, 55086325175168, 372549608975494, 2519764601804580, 17043643041857548 (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 22 differing by two or less A126409, one or less A126376.

Sequence in context: A185397 A179792 A125332 * A200776 A169722 A262139

Adjacent sequences:  A126487 A126488 A126489 * A126491 A126492 A126493

KEYWORD

nonn,base

AUTHOR

R. H. Hardin, Dec 27 2006

STATUS

approved

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Last modified October 2 23:51 EDT 2022. Contains 357230 sequences. (Running on oeis4.)