461041

Appears in sequences

• Odd pentagonal pyramidal numbers.at n=24A015223
• Squares which are the sum of two or more consecutive squares.at n=25A151557
• Numbers k dividing u(k), where the Lucas sequence is defined u(i) = u(i-1) - 2*u(i-2) with initial conditions u(0)=0, u(1)=1.at n=11A228439
• Squares s such that s + 1234567890 is prime.at n=22A241538
• Squares that are also pentagonal pyramidal numbers.at n=7A277792
• Discriminants of totally real cubic fields with noncyclic class group.at n=28A329785
• Discriminants with exactly 2 associated cyclic cubic fields.at n=23A343002
• Discriminants with at least 2 associated cyclic cubic fields.at n=23A343024
• a(n) = (3*n - 2)^2*(3*n - 1)/2.at n=32A386906
• Detour index of the n X n black bishop graph.at n=13A387645
• a(n) = (8*n + 1)^2*(4*n + 1).at n=12A387684