118332

Appears in sequences

• Number of 3 X n (0,1) matrices such that each row and each column is nondecreasing or nonincreasing.at n=37A086113
• Total number of blocks in all set partitions of [n] with alternating parity of elements.at n=12A305823
• Expansion of Product_{k>=1} 1/(1 - x^k)^(k-phi(k)), where phi() is the Euler totient function (A000010).at n=36A307705