205680

Appears in sequences

• Coordination sequence for F_4 lattice.at n=15A019558
• Expansion of Product_{k>=1} (1 + 3*x^k).at n=36A032308
• Irregular triangle read by rows: T(n,k) (n>=2, 1<=k<=n) gives number of arrangements of the elements from the multiset M(n, 3) into exactly k disjoint cycles.at n=44A245183