A259702 Row sums of A259701 except first column.

0, 0, 0, 1, 2, 9, 21, 78, 199, 699, 1889, 6491, 18261, 62145, 180091, 610220, 1809045, 6118849, 18469079, 62440111, 191235803, 646681908, 2004592956, 6782895492, 21239394216, 71925883149, 227169634741, 769998727785, 2450045838331, 8312417389237, 26620229804149

Offset

2,5

References

A. Sade, Sur les Chevauchements des Permutations, published by the author, Marseille, 1949.

Links

Table of n, a(n) for n=2..32.

Albert Sade, Sur les Chevauchements des Permutations, published by the author, Marseille, 1949. [Annotated scanned copy]

Mathematica

A000682 = Import["https://oeis.org/A000682/b000682.txt", "Table"][[All, 2]];
a[n_] := If[n <= 2, 0, A000682[[n]]/2 - A000682[[n - 1]]];
a /@ Range[2, 32] (* Jean-François Alcover, Sep 03 2019, from A301620 *)

Crossrefs

Cf. A259701.

Cf. A301620 (essentially twice this sequence).

Sequence in context: A237044 A342713 A248116 * A377793 A284923 A343850

Adjacent sequences: A259699 A259700 A259701 * A259703 A259704 A259705

Keyword

nonn

Author

N. J. A. Sloane, Jul 05 2015

Extensions

a(12) from Andrew Howroyd, Dec 07 2018

More terms (using the terms of A301620) from Joerg Arndt, Dec 25 2018

Status

approved