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Search: id:A126366
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| A126366 |
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Number of base 12 n-digit numbers with adjacent digits differing by one or less. |
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+0
5
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| 1, 12, 34, 98, 284, 826, 2408, 7032, 20562, 60186, 176312, 516844, 1515926, 4448336, 13058280, 38345702, 112633540, 330918226, 972433832, 2858069380, 8401323984, 24698783724, 72618671844, 213530132914, 627917268794
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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[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
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PROGRAM
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(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-2](($[i]`-$[i+1]`>1)+($[i+1]`-$[i]`>1))
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CROSSREFS
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Sequence in context: A069125 A139635 A124705 this_sequence A009760 A078194 A034510
Adjacent sequences: A126363 A126364 A126365 this_sequence A126367 A126368 A126369
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KEYWORD
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nonn
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AUTHOR
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Ron Hardin (rhh(AT)cadence.com), Dec 26 2006
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