113297domain: NAppears in sequencesDenominators of continued fraction convergents to sqrt(637).at n=9A042223a(n) = n*(4*n^2+5*n-3)/2.at n=37A126335Expansion of 1/(1 - Sum_{k>=2} floor(1/omega(2*k-1))*x^(2*k-1)), where omega() is the number of distinct prime factors (A001221).at n=48A280200