57406

Appears in sequences

• Number of directed animals on a certain lattice.at n=6A011792
• Engel expansion of Pi^2/6, or zeta(2) = 1.64493.at n=14A059186
• Number of partitions p of n such that 4*min(p) is a part of p.at n=46A238591
• G.f. A(x) satisfies A(x)^2 = 1 + x + x*A(x)^7.at n=7A295537
• a(n) = Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} phi(i*j*k).at n=9A372661
• a(n) = [(x*y)^n] Product_{k>=1} (1 - x^k - y^k)^k.at n=18A381011