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A126485
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Number of base 17 n-digit numbers with adjacent digits differing by three or less.
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2
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1, 17, 107, 693, 4531, 29785, 196419, 1297863, 8586301, 56847741, 376551555, 2494950507, 16533981983, 109582499195, 726331242669, 4814449605487, 31913168495095, 211543760702517, 1402280350135071, 9295487072185279
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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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
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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))
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CROSSREFS
| Cf. Base 17 differing by two or less A126404, one or less A126371.
Sequence in context: A142321 A007682 A125327 * A159031 A080441 A135400
Adjacent sequences: A126482 A126483 A126484 * A126486 A126487 A126488
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KEYWORD
| nonn,base
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AUTHOR
| R. H. Hardin (rhhardin(AT)att.net), Dec 27 2006
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