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Search: id:A126537
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| A126537 |
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Number of base 16 n-digit numbers with adjacent digits differing by five or less. |
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+0
1
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| 1, 16, 146, 1386, 13276, 127470, 1224594, 11766272, 113057850, 1086341506, 10438376428, 100299731078, 963754991066, 9260480594912, 88981641951426, 855002344551114, 8215503709753468, 78940720623107646, 758521643084139202
(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)+11^(n-1) for base>=5n-4; a(base,n)=a(base-1,n)+11^(n-1)-2 when base=5n-5
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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]`-$[i+1]`>5)+($[i+1]`-$[i]`>5))
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CROSSREFS
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Cf. Base 16 differing by four or less A126511, three or less A126484, two or less A126403, one or less A126370.
Sequence in context: A052388 A027651 A125379 this_sequence A135458 A000486 A006420
Adjacent sequences: A126534 A126535 A126536 this_sequence A126538 A126539 A126540
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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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