5038592domain: NAppears in sequencesa(n) = sigma(2*n^4) - sigma(n^4).at n=35A224903a(n) is the numerator of the ratio of winning probabilities P_A/P_B of winning in a 2-player game with a ratio of odds for A and B in a single round of 2:1. To win the game it is necessary to win n rounds in a row.at n=8A370823