A198014 Number of isomorphism classes of nanocones with 3 pentagons and a nearsymmetric boundary of length n

2, 8, 18, 37, 63, 104, 153, 224, 305, 413, 534, 688, 856, 1064, 1288, 1557, 1845, 2184, 2543, 2960, 3399, 3901, 4428, 5024, 5646, 6344, 7070, 7877, 8715, 9640, 10597, 11648, 12733, 13917, 15138, 16464, 17828, 19304, 20820, 22453, 24129, 25928, 27771, 29744

Offset

1,1

Links

Nico Van Cleemput, Table of n, a(n) for n = 1..75

Gunnar Brinkmann and Nico Van Cleemput, Classification and generation of nanocones, Discrete Applied Mathematics, 159 (2011), 1528-1539.

Formula

Conjectured g.f.: (3*x^5 + 2*x^4 + 5*x^3 + 6*x^2 + 6*x + 2)*x/((x - 1)^4*(x + 1)^2*(x^2 + x + 1)). [D. S. McNeil, Oct 20 2011]

Crossrefs

Sequence in context: A166830 A072779 A292764 * A252592 A188577 A064705

Adjacent sequences: A198011 A198012 A198013 * A198015 A198016 A198017

Keyword

nonn

Author

Nico Van Cleemput, Oct 20 2011

Status

approved