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Search: id:A126410
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| A126410 |
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Number of base 23 n-digit numbers with adjacent digits differing by two or less. |
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+0
4
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| 1, 23, 109, 525, 2543, 12361, 60223, 293899, 1436105, 7024405, 34386235, 168441635, 825574805, 4048257077, 19858855181, 97451838245, 478360096877, 2348721744139, 11534669029037, 56658230250101, 278351957108055
(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)+5^(n-1) for base>=2n-1; a(base,n)=a(base-1,n)+5^(n-1)-2 when base=2n-2
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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]`-$[i+1]`>2)+($[i+1]`-$[i]`>2))
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CROSSREFS
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Cf. Base 23 differing by one or less A126377.
Adjacent sequences: A126407 A126408 A126409 this_sequence A126411 A126412 A126413
Sequence in context: A139912 A142272 A124951 this_sequence A071634 A101804 A142324
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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 28 2006
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