40679

Appears in sequences

• Expansion of x*(1+3*x)*(1+6*x+16*x^2)/((1-x)*(1+2*x)*(1-3*x-2*x^2)).at n=7A120723
• a(n) is the least integer such that the iterated modulus chain m_1=mod(a(n),m),m_2=mod(a(n),m_1),m_3=mod(a(n),m_2),..., m_n= (0 or 1) reaches a length n. The companion value m, associated to a(n), is given in A177968.at n=29A177967
• a(n) = Sum_{d|n} d^2 * (d+1)/2.at n=42A278403
• Number of phylogenetic trees with n labels and no singleton leaves.at n=8A320289
• Number of partitions of n with up to two distinct kinds of 1.at n=44A320689
• Numbers m that generate rotationally symmetrical XOR-triangles T(m) that have central triangles of zeros.at n=37A334769
• The number of overpartitions of n where the number of non-overlined parts is at least two more than the number of overlined parts.at n=27A340668