150732

Appears in sequences

• Number of isomorphism classes of nanocones with 5 pentagons and a symmetric boundary of length n.at n=20A198086
• Number of permutations of [n] avoiding the generalized patterns 1(k+2)-(u_1+1)-...-(u_k+1) for all permutations u of [k].at n=74A263791
• a(n) = Sum_{i+j+k+m=n, i,j,k,m >= 1} tau(i) * tau(j) * tau(k) * tau(m).at n=27A375002