264816

Appears in sequences

• Triangle read by rows: T(n,k) = number of functions from an n-element set into but not onto a k-element set.at n=26A101030
• Fourth differences of A129983.at n=16A129988
• Expansion of Product_{k>=1} 1 / (1 - 2*x^k)^2.at n=12A266943