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Search: id:A081146
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| 1, 2, 5, 3, 8, 11, 4, 6, 14, 17, 20, 9, 23, 7, 26, 12, 29, 32, 35, 10, 15, 38, 40, 43, 18, 46, 13, 21, 49, 52, 55, 58, 24, 16, 61, 64, 27, 67, 70, 72, 19, 30, 75, 77, 33, 80, 22, 36, 83, 86, 89, 92, 95, 25, 39, 98, 101, 41, 104, 28, 44, 107, 110, 113, 116, 47, 119, 31, 122
(list; graph; listen)
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OFFSET
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1,2
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LINKS
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Index entries for sequences that are permutations of the natural numbers
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MATHEMATICA
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f[s_] := Block[{d = Abs[Rest@s - Most@s], k = 1}, While[ MemberQ[d, Abs[k - Last@s]] || MemberQ[s, k], k++ ]; Append[s, k]]; t = Nest[f, {1}, 130]; Table[ Position[t, n], {n, 70}] // Flatten (from Robert G. Wilson v (rgwv(at)rgwv.com), Jun 09 2006)
f[s_] := Block[{k = 1, d = Abs[Most@s - Rest@s], l = Last@s}, While[MemberQ[s, k] || MemberQ[d, Abs[l - k]], k++ ]; Append[s, k]]; t = Nest[f, {1}, 125]; Table[Position[t, n], {n, 71}] // Flatten (from Robert G. Wilson v (rgwv(at)rgwv.com), Jun 13 2006)
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CROSSREFS
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Cf. A081145.
Sequence in context: A097594 A050171 A136189 this_sequence A082652 A065222 A159988
Adjacent sequences: A081143 A081144 A081145 this_sequence A081147 A081148 A081149
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KEYWORD
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nonn
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AUTHOR
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Don Reble (djr(AT)nk.ca), Mar 08 2003
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