0,3
Table of n, a(n) for n=0..7.
H. Cheballah, S. Giraudo, R. Maurice, Combinatorial Hopf algebra structure on packed square matrices, arXiv preprint arXiv:1306.6605, 2013
Sequence in context: A134055 A136281 A125698 * A052447 A226458 A330870
Adjacent sequences: A231492 A231493 A231494 * A231496 A231497 A231498
nonn,more
N. J. A. Sloane, Nov 09 2013
approved