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

0,2

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

Formula

EULERi transform of A004106.

Crossrefs

Cf. A004106, A320491.

Sequence in context: A295907 A317364 A265664 * A326215 A248643 A199852

Adjacent sequences: A320487 A320488 A320489 * A320491 A320492 A320493

Keyword

nonn

Author

N. J. A. Sloane, Oct 25 2018

Extensions

Definition edited by Andrew Howroyd, Jan 26 2020

Status

approved