20401094656domain: NAppears in sequences8th binomial transform of (1,1,0,0,0,0,...).at n=11A081108Denominators of Pi-independent part of even terms in the probability of obtaining an acute triangle by picking n points at random in the unit n-ball.at n=13A093759a(n) = 19*2^n.at n=30A110288A (4,-8) Somos-4 sequence.at n=9A178077