651521

Appears in sequences

• a(n+1) = a(n) + n (if n is even), a(n+1) = a(n) * n (if n is odd).at n=13A047905
• A (4,-5) Somos-4 sequence.at n=7A171422
• A (1,1) Somos-4 sequence associated to the elliptic curve E: y^2 + x*y - y = x^3 - x^2 + x and point (0,0).at n=17A178627