0,4
Table of n, a(n) for n=0..10.
H. Cheballah, S. Giraudo, R. Maurice, Combinatorial Hopf algebra structure on packed square matrices, arXiv preprint arXiv:1306.6605, 2013
Sequence in context: A276728 A256006 A137646 * A168602 A000798 A135485
Adjacent sequences: A231495 A231496 A231497 * A231499 A231500 A231501
nonn,more
N. J. A. Sloane, Nov 09 2013
approved