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Search: id:A125463
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| A125463 |
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Number of base 28 circular n-digit numbers with adjacent digits differing by 8 or less. |
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+0
1
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| 1, 28, 404, 4852, 67556, 960148, 13958756, 205641268, 3058942852, 45812752948, 689466153924, 10412174282164, 157628891411396, 2390475045101652, 36296487695153124, 551594042350858612, 8387602963201535236
(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(8) for base>=8.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]`-$[(i+1)mod N]`>8)+($[(i+1)mod N]`-$[i]`>8))
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CROSSREFS
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Sequence in context: A035709 A035476 A042518 this_sequence A010980 A022592 A121798
Adjacent sequences: A125460 A125461 A125462 this_sequence A125464 A125465 A125466
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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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