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Search: id:A125411
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| A125411 |
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Number of base 23 circular n-digit numbers with adjacent digits differing by 6 or less. |
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+0
1
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| 1, 23, 257, 2375, 25485, 278903, 3123797, 35463983, 406719021, 4698846899, 54583098727, 636626661991, 7447641422289, 87321630757865, 1025514521755099, 12058435600011515, 141915563933099549
(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)+F(6) for base>=6.int(n/2)+1, and F(d) is the largest coefficient in (1+x+...+x^(2d))^n
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PROGRAM
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(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>6)+($[(i+1)mod N]`-$[i]`>6))
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CROSSREFS
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Sequence in context: A010939 A022618 A042018 this_sequence A140620 A002681 A142220
Adjacent sequences: A125408 A125409 A125410 this_sequence A125412 A125413 A125414
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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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