121117

Appears in sequences

• a(n) = n*(4*n^2 + 2*n + 1).at n=31A110451
• Number of n-bead necklaces labeled with numbers -5..5 not allowing reversal, with sum zero and avoiding the patterns z z+1 z+2 and z z-1 z-2.at n=6A209112
• T(n,k) = number of n-bead necklaces labeled with numbers -k..k not allowing reversal, with sum zero and avoiding the patterns z z+1 z+2 and z z-1 z-2.at n=61A209115
• Number of 7-bead necklaces labeled with numbers -n..n not allowing reversal, with sum zero and avoiding the patterns z z+1 z+2 and z z-1 z-2.at n=4A209119