0,3

5*n^4/6 + n^2/6;

Sequence in context: A071616 A008529 A075480 this_sequence A116671 A051879 A002423

Adjacent sequences: A008351 A008352 A008353 this_sequence A008355 A008356 A008357

nonn

njas and J. H. Conway (conway(AT)math.princeton.edu)