A064639 Positions of non-crossing fixed-point-free involutions encoded by A014486 (after reflection) in A055089. Permutation of A064640.

0, 1, 7, 23, 127, 143, 415, 659, 719, 5167, 5183, 5455, 5699, 5759, 16687, 16703, 26815, 36899, 36959, 28495, 38579, 40031, 40319, 368047, 368063, 368335, 368579, 368639, 379567, 379583, 389695, 399779, 399839, 391375, 401459, 402911, 403199

Offset

0,3

Links

Table of n, a(n) for n=0..36.

Maple

map(PermRevLexRank, map(NonCrossingTransposRev, A014486)); NonCrossingTransposRev := n -> convert(NonCrossingTransposAux(deepreverse(binexp2pars(n)), 1), 'permlist', binwidth(n));

Crossrefs

Maple procedure deepreverse given in A057502, for others, follow A064638. Same sequence sorted: A064640.

Sequence in context: A267926 A228698 A064640 * A064638 A082021 A227254

Adjacent sequences: A064636 A064637 A064638 * A064640 A064641 A064642

Keyword

nonn

Author

Antti Karttunen, Oct 15 2001

Status

approved