80017

Appears in sequences

• Erroneous version of A000940.at n=9A004577
• Variant of Lucas numbers: a(n) = a(n-1) + 4*a(n-2) starting with a(0)=2 and a(1)=1.at n=12A072265
• Duplicate of A072265.at n=12A085488
• Sum of column entries of the table with rows of prime numbers (2,3,0,0,...), (0,5,7,11,0,...), (0,0,13,17,19,23,0,...), (0,0,0,29,31,37,41,43,0,...), ...at n=40A238760
• Numbers k such that sigma(k) = psi(k) + tau(k)^3.at n=27A390297