|
| |
|
|
A081146
|
|
Inverse permutation to A081145.
|
|
1
| |
|
|
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; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,2
|
|
|
LINKS
| Index entries for sequences that are permutations of the natural numbers
|
|
|
MATHEMATICA
| 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)
|
|
|
CROSSREFS
| Cf. A081145.
Sequence in context: A197393 A050171 A136189 * A082652 A194007 A065222
Adjacent sequences: A081143 A081144 A081145 * A081147 A081148 A081149
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Don Reble (djr(AT)nk.ca), Mar 08 2003
|
| |
|
|
