91120

Appears in sequences

• Concatenation of odd n and even n-th nonprime.at n=31A155486
• T(n,k) = Number of n-turn bishop's tours on a k X k board summed over all starting positions.at n=59A188777
• Number of 5-turn bishop's tours on an n X n board summed over all starting positions.at n=6A188780
• a(n) = 2*a(n-1) + a(n-2) - 4*a(n-3) + 2*a(n-4) + a(n-5) -2*a(n-6) + a(n-7) for n >= 7, a(0) = 2, a(1) = 4, a(2) = 7, a(3) = 11, a(4) = 18, a(5) = 30, a(6) = 47.at n=24A289077