302720

Appears in sequences

• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-2)^2, where a(0) = 1, a(1) = 3, b(0) = 2, and (a(n)) and (b(n)) are increasing complementary sequences.at n=20A296258
• a(n) = Sum_{1 <= i, j, k, l <= n} gcd(i,j,k,l).at n=22A344523
• Sum_{n>=0} a(n) * x^n / (n!)^2 = -log(BesselJ(0,2*sqrt(2*x))) / 2.at n=6A372513