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 A051733 Numbers n such that A051732(n) = n-1. 2
 2, 3, 6, 7, 10, 15, 19, 27, 30, 31, 34, 42, 51, 54, 66, 70, 75, 82, 87, 90, 91, 99, 106, 114, 135, 147, 159, 174, 175, 187, 190, 195, 210, 211, 222, 231, 234, 246, 255, 262, 271, 274, 279, 282, 294, 307, 310, 327, 330, 331, 339, 351, 355, 379, 387, 394, 399, 411, 414 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Olivier Gérard and Vincenzo Librandi, Table of n, a(n) for n = 1..6000 (first 386 terms from Olivier Gérard). MATHEMATICA (* v8 *) Select[Range[2, 4000], Function[n, Sort[First[First[PermutationCycles@Join[Table[2r-1, {r, 1, n}], Table[2r-2n, {r, n+1, 2n}]]]]]==Range[2, 2n-1]]] (* Olivier Gérard, Nov 08 2012 *) CROSSREFS Cf. A051732. Equals A217948(n)/2. Sequence in context: A093677 A288672 A086495 * A058632 A086583 A107852 Adjacent sequences:  A051730 A051731 A051732 * A051734 A051735 A051736 KEYWORD easy,nonn AUTHOR Marie-Christine Haton (Marie-Christine.Haton(AT)loria.fr) STATUS approved

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Last modified October 20 08:05 EDT 2019. Contains 328252 sequences. (Running on oeis4.)