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A126384 Number of base 30 n-digit numbers with adjacent digits differing by one or less. 4
1, 30, 88, 260, 770, 2284, 6782, 20154, 59928, 178284, 530606, 1579726, 4704572, 14014274, 41756092, 124439108, 370913490, 1105756236, 3296937150, 9831523710, 29321421468, 87457888182, 260890934448, 778326317088 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

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

LINKS

Table of n, a(n) for n=0..23.

PROG

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

CROSSREFS

Sequence in context: A254474 A103906 A124799 * A025417 A081807 A008445

Adjacent sequences:  A126381 A126382 A126383 * A126385 A126386 A126387

KEYWORD

nonn,base

AUTHOR

R. H. Hardin, Dec 26 2006

STATUS

approved

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Last modified March 5 16:55 EST 2021. Contains 341827 sequences. (Running on oeis4.)