A320490 Inverse Euler transform of A004106.

1, 2, 0, 4, 16, 98, 766, 9982, 205574, 6546960, 352380815, 29668304472, 4303531875334, 985391751078694, 391866509413730125, 248491878411568471280, 274544424465173973822126, 488310442484985365942048784, 1513516279388226700191978571979

Offset: 0

Author

N. J. A. Sloane, Oct 25 2018

Keywords

• nonn

Comments

The inverse Euler transform of A004106 does not give the number of connected edge-self-dual nets. The combinatorial interpretation of this sequence is that of either a connected edge-self-dual net or a pair of distinct connected nets which are edge-dual to each other (but not edge-self-dual). - Andrew Howroyd, Jan 28 2020

Links

• Andrew Howroyd, Table of n, a(n) for n = 0..50
• N. J. A. Sloane, Transforms

Crossrefs

Cf. A004106, A320491.

Formula

EULERi transform of A004106.

Extensions

Definition edited by Andrew Howroyd, Jan 26 2020