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A125389
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Number of base 26 circular n-digit numbers with adjacent digits differing by 5 or less.
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0
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1, 26, 256, 2036, 18916, 178776, 1730542, 16983454, 168485308, 1685157860, 16963782666, 171654215594, 1744297209730, 17786783187134, 181898203342216, 1864685423926896, 19153948120401164, 197081201888778900
(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: A060105 A108645 A086023 * A109467 A126547 A136922
Adjacent sequences: A125386 A125387 A125388 * A125390 A125391 A125392
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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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