57607

Appears in sequences

• a(n) = T(n,n+2) where T is the array defined in A025564.at n=9A025568
• Number of n X 3 arrays of the minimum value of corresponding elements and their horizontal, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..1 n X 3 array.at n=33A219514
• For 1<=x<=n, 1<=y<=n, write gcd(x,y) = u*x+v*y with u,v minimal; a(n) = sum of the values of u^2+v^2.at n=34A345434
• Starts of runs of 3 consecutive Pell-Niven numbers (A352320).at n=28A352322
• Expansion of 1/(1 - x*(1 + x)^3)^2.at n=10A382613
• E.g.f. A(x) satisfies A(x) = exp( x/(1-x^2)^2 * A(x) ).at n=6A390182