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Search: id:A125436
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| A125436 |
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Number of base 24 circular n-digit numbers with adjacent digits differing by 7 or less. |
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+0
1
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| 1, 24, 304, 3216, 39392, 492544, 6298624, 81606304, 1067317248, 14050718688, 185820522784, 2465340570112, 32781260766464, 436559667792896, 5820017454078208, 77646928813225216, 1036440399775034368
(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: A100130 A014103 A000552 this_sequence A096821 A053215 A004413
Adjacent sequences: A125433 A125434 A125435 this_sequence A125437 A125438 A125439
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KEYWORD
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nonn
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AUTHOR
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Ron Hardin (rhh(AT)cadence.com), Dec 28 2006
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