146256

Appears in sequences

• a(n) = (2*n)!*Sum[Sum[1/(i+j),{i,1,n}],{j,1,n}].at n=3A086881
• G.f. satisfies: x = A(x) - A(A(x))^2 - A(A(A(x)))^2.at n=5A177397
• Triangle read by rows: numerators of coefficients of the Hirzebruch L-polynomials L_n expressing the signature of a 4n-dimensional manifold in terms of its Pontrjagin numbers (as in Hirzebruch Signature Theorem).at n=32A237111
• Number of set partitions of [n] into exactly eight blocks such that all odd elements are in blocks with an odd index and all even elements are in blocks with an even index.at n=7A274872
• a(n) is the number of partitions of n with Durfee square of size <= 5.at n=48A330643