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A125388
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Number of base 25 circular n-digit numbers with adjacent digits differing by 5 or less.
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0
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1, 25, 245, 1945, 18025, 169975, 1641629, 16074699, 159107841, 1587693061, 15944909855, 160952971853, 1631461695001, 16593111357549, 169235353884807, 1730038601905255, 17719417102045601, 181773198890744037
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| [Empirical] a(base,n)=a(base-1,n)+F(5) for base>=5.int(n/2)+1 and F(d) is the largest coefficient in (1+x+...+x^(2d))^n
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PROG
| (S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>5)+($[(i+1)mod N]`-$[i]`>5))
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CROSSREFS
| Sequence in context: A088890 A108178 A107943 * A126546 A023073 A022685
Adjacent sequences: A125385 A125386 A125387 * A125389 A125390 A125391
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KEYWORD
| nonn,base
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AUTHOR
| R. H. Hardin (rhhardin(AT)att.net), Dec 28 2006
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