61065

Appears in sequences

• G.f.: G'(x) / G(x) where G(x) = 1 / sqrt( AGM((1 - 3*x)^2, (1 + x)^2) ) is the g.f. of A245931.at n=11A245932
• Numbers k such that 3k - 1 divides 3^k - 1.at n=28A273614
• a(n) = A273059(4n+1).at n=43A275917
• a(n) = binomial(n^2,n) mod n^5.at n=14A371471
• a(n) = Sum_{1 <= x_1, x_2 <= n} gcd(x_1, x_2, n)^5.at n=8A372927