140624

Appears in sequences

• Number of Hamiltonian paths in C_4 X P_n.at n=5A003752
• a(n) = 9*5^n-1.at n=6A198768
• a(n) = A173675(A025487(n)).at n=30A295786
• Numbers k such that k and k+1 are both half-Zumkeller numbers (A246198).at n=15A331371