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Search: id:A126551
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| A126551 |
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Number of base 30 n-digit numbers with adjacent digits differing by five or less. |
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+0
1
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| 1, 30, 300, 3080, 31910, 332332, 3472294, 36356914, 381225854, 4001308564, 42025251756, 441585511330, 4641438979272, 48795642652634, 513063278382886, 5395138052943334, 56736497174383966, 596680299580096756
(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 30 differing by four or less A126525, three or less A126498, two or less A126417, one or less A126384.
Sequence in context: A101381 A061605 A125393 this_sequence A042750 A074994 A134287
Adjacent sequences: A126548 A126549 A126550 this_sequence A126552 A126553 A126554
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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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