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A126476
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Number of base 8 n-digit numbers with adjacent digits differing by three or less.
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2
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1, 8, 44, 252, 1446, 8300, 47642, 273466, 1569700, 9010108, 51718192, 296863410, 1704001644, 9781001986, 56143138234, 322262685896, 1849793972828, 10617852738356, 60946677537854, 349835093256180, 2008060117756986
(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 8 differing by two or less A126395, one or less A126362.
Sequence in context: A082762 A147828 A155604 * A112908 A028565 A129553
Adjacent sequences: A126473 A126474 A126475 * A126477 A126478 A126479
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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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