277608

Appears in sequences

• Expansion of 1/((1-x)(1-4x)(1-11x)).at n=5A016226
• Let b(n) be the number of permutations {c_1..c_n} of {1..n} for which c_1 - c_2 + ... + (-1)^(n-1)*c_n are triangular numbers (A000217). Then a(n) = b(n)/A010551(n).at n=24A294811