0,3
Table of n, a(n) for n=0..4.
H. Cheballah, S. Giraudo, R. Maurice, Combinatorial Hopf algebra structure on packed square matrices, arXiv preprint arXiv:1306.6605, 2013
Sequence in context: A129423 A324095 A290880 * A048291 A015089 A179565
Adjacent sequences: A231483 A231484 A231485 * A231487 A231488 A231489
nonn,more
N. J. A. Sloane, Nov 09 2013
approved