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Search: id:A125481
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| A125481 |
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Number of base 24 circular n-digit numbers with adjacent digits differing by 9 or less. |
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+0
1
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| 1, 24, 366, 4794, 71946, 1103274, 17241126, 272084382, 4318731786, 68774290062, 1097231236566, 17523514179426, 280025416243206, 4476263547270006, 71567092311364148, 1144341462099767544, 18298809277285998746
(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(9) for base>=9.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]`-$[(i+1)mod N]`>9)+($[(i+1)mod N]`-$[i]`>9))
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CROSSREFS
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Sequence in context: A052741 A046905 A028115 this_sequence A028074 A028111 A053062
Adjacent sequences: A125478 A125479 A125480 this_sequence A125482 A125483 A125484
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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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