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Search: id:A126368
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| A126368 |
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Number of base 14 n-digit numbers with adjacent digits differing by one or less. |
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+0
5
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| 1, 14, 40, 116, 338, 988, 2894, 8490, 24936, 73308, 215678, 634942, 1870220, 5511218, 16246924, 47911604, 141330980, 417008740, 1230695000, 3632799810, 10725265920, 31669512054, 93526269170, 276234529396, 815959178108
(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: A101740 A069126 A124707 this_sequence A125816 A105869 A056034
Adjacent sequences: A126365 A126366 A126367 this_sequence A126369 A126370 A126371
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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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