66456

Appears in sequences

• a(n) = n! * (n + 1 + 2*Sum_{k=1...n} 1/k).at n=7A000775
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 0), (0, 0, 1), (1, -1, 1), (1, 0, -1), (1, 1, 1)}.at n=8A150872
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2 + (x+511)^2 = y^2.at n=28A207078
• Number of partitions of n in which exactly one odd part is repeated and even parts are unrestricted.at n=47A353903
• G.f. A(x) satisfies: A( 3*A(x)^3 - 54*A(x)^4 ) = 3*x^3.at n=4A369532