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Search: id:A125434
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| A125434 |
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Number of base 22 circular n-digit numbers with adjacent digits differing by 7 or less. |
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+0
1
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| 1, 22, 274, 2878, 34882, 431782, 5461618, 69940774, 903223618, 11728549510, 152847561714, 1996603379606, 26120802913570, 342065474231334, 4482377137554002, 58760550692131318, 770509932031611266
(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(7) for base>=7.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]`-$[(i+1)mod N]`>7)+($[(i+1)mod N]`-$[i]`>7))
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CROSSREFS
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Sequence in context: A004412 A055756 A128766 this_sequence A023020 A022650 A004316
Adjacent sequences: A125431 A125432 A125433 this_sequence A125435 A125436 A125437
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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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