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Search: id:A126552
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| A126552 |
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Number of base 31 n-digit numbers with adjacent digits differing by five or less. |
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+0
1
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| 1, 31, 311, 3201, 33241, 346973, 3633345, 38128475, 400712365, 4215612885, 44381119457, 467467444891, 4925548461045, 51911345979157, 547195680951947, 5768641876348183, 60819051384616763, 641254077894118141
(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 31 differing by four or less A126526, three or less A126499, two or less A126418, one or less A126385.
Sequence in context: A042870 A152033 A125394 this_sequence A068813 A142382 A137318
Adjacent sequences: A126549 A126550 A126551 this_sequence A126553 A126554 A126555
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KEYWORD
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nonn
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AUTHOR
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Ron Hardin (rhhardin(AT)att.net), Dec 28 2006
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