92118domain: NAppears in sequencesa(n) = [ a(n-1)/a(1) ] + [ a(n-2)/a(2) ] + ... + [ a(1)/a(n-1) ], for n >= 3.at n=25A022864Expansion of Product_{k>=1} 1/(1 - k*(x^(2*k+1))).at n=47A266138