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Search: id:A125382
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| A125382 |
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Number of base 19 circular n-digit numbers with adjacent digits differing by 5 or less. |
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+0
1
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| 1, 19, 179, 1399, 12679, 117169, 1108151, 10622169, 102843047, 1002906517, 9832026699, 96763261669, 955021583503, 9445371945561, 93558608546267, 927743558287129, 9207050413918087, 91425186769710909, 908226948062391227
(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(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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PROGRAM
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(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>5)+($[(i+1)mod N]`-$[i]`>5))
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CROSSREFS
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Sequence in context: A060222 A041690 A133740 this_sequence A126540 A008419 A034273
Adjacent sequences: A125379 A125380 A125381 this_sequence A125383 A125384 A125385
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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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