A380619 Number of sensed combinatorial maps with n edges and 3 vertices.

1, 5, 34, 288, 3102, 39242, 573654, 9484003, 175036065, 3568736050, 79697415569, 1935425955944, 50794210191337, 1432898704970561, 43244525933606928, 1390448844972918928, 47455314531812444788, 1713525997666221196906, 65266335503957271588042, 2615307907226341637828915

Offset: 2

Author

Andrew Howroyd, Jan 28 2025

Keywords

• nonn

Comments

By duality, also the number of sensed combinatorial maps with n edges and 3 faces.

Links

• Andrew Howroyd, Table of n, a(n) for n = 2..200

Crossrefs

Column 3 of A380615.

Cf. A380618 (2 vertices), A380621 (unsensed).

Programs

PARI

\\ Needs G(), InvEulerMTS from A380615.
seq(n, k=3)={my(y='y); Vec(polcoef(InvEulerMTS(G(n, y*(1 + O(y^k)))), k, y))}