344608domain: NAppears in sequencesDenominators of continued fraction convergents to sqrt(554).at n=11A042061Expansion of 1/(1 - x*Product_{k>=1} (1 + x^(2*k))/(1 - x^(2*k-1))).at n=16A302020a(n) = (3*n - 2)^2*(3*n - 1)/2.at n=29A386906