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Search: id:A126393
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| A126393 |
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Number of base 6 n-digit numbers with adjacent digits differing by two or less. |
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+0
3
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| 1, 6, 24, 100, 418, 1748, 7310, 30570, 127842, 534628, 2235784, 9349922, 39100844, 163517514, 683820978, 2859700582, 11959105792, 50012302772, 209148616298, 874647662172, 3657726962214, 15296406894730, 63968706878962
(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 6 differing by one or less A126360.
Sequence in context: A048179 A117614 A037688 this_sequence A120583 A089378 A074414
Adjacent sequences: A126390 A126391 A126392 this_sequence A126394 A126395 A126396
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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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