53724

Appears in sequences

• Number of positive integers <= 2^n of form 9 x^2 + 9 y^2.at n=21A054193
• a(n) = sum of the squares of the coefficients of x^n in x^(n-2*k)/A(x^2)^(n-2*k+1), as k varies from 0 to floor(n/2), with a(0)=1, where A(x) is the g.f. of this sequence.at n=17A132455
• a(n) = (n^2 + 2*(Sum_{j = 1..n} j^n)) (mod n^3).at n=43A219540
• G.f. A(x) satisfies A(x) = 1/( 1 - x*A(x)^2*(1 + 9*x*A(x))^(1/3) ).at n=7A372136