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A126414 Number of base 27 n-digit numbers with adjacent digits differing by two or less. 3
1, 27, 129, 625, 3043, 14861, 72723, 356399, 1748605, 8586905, 42198735, 207504135, 1020887305, 5024819575, 24741667433, 121865892063, 600430229661, 2959070561939, 14586392574071, 71916648942815, 354642311037069 (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 27 differing by one or less A126381.

Sequence in context: A267935 A048615 A124955 * A183427 A262852 A066414

Adjacent sequences:  A126411 A126412 A126413 * A126415 A126416 A126417

KEYWORD

nonn,base

AUTHOR

R. H. Hardin, Dec 28 2006

STATUS

approved

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Last modified July 4 16:24 EDT 2020. Contains 335448 sequences. (Running on oeis4.)