87185

Appears in sequences

• Triangle read by rows: T(n,k), n >=1, 0 <= k <= C(n,k), = number of n X n symmetric positive definite matrices with 2's on the main diagonal and 1's and 0's elsewhere and with k 1's above the diagonal.at n=50A080858
• a(n) = A175369(n^2).at n=32A175370
• Number of parts that are visible in one of the three views of the shell model of partitions version "Tree" with n shells.at n=40A194803
• Number of compositions (ordered partitions) of n^3 into at most n cubes.at n=9A347591