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Search: id:A126536
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| A126536 |
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Number of base 15 n-digit numbers with adjacent digits differing by five or less. |
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+0
1
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| 1, 15, 135, 1265, 11945, 112969, 1068723, 10111095, 95661377, 905057497, 8562802623, 81013191559, 766470702689, 7251625683041, 68608069306975, 649105094579799, 6141222571633425, 58102478303643985, 549711062520950431
(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 15 differing by four or less A126510, three or less A126483, two or less A126402, one or less A126369.
Sequence in context: A036217 A022643 A125378 this_sequence A030056 A123955 A027802
Adjacent sequences: A126533 A126534 A126535 this_sequence A126537 A126538 A126539
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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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