35684domain: NAppears in sequencesRecursively defined polynomials, read by row.at n=50A109086G.f.: Sum_{n=-oo..+oo} x^n * (1 + x^n)^n, an even function.at n=60A260361Numbers k such that k^2, (k+1)^2 and (k+2)^2 are all abundant numbers.at n=10A383391