a(n) = (a(n-1) * a(n-6) + 2 * a(n-3) * a(n-4)) / a(n-7). a(1) = ... = a(7) = 1. Somos-7 variation.

A064268

a(n) = (a(n-1) * a(n-6) + 2 * a(n-3) * a(n-4)) / a(n-7). a(1) = ... = a(7) = 1. Somos-7 variation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =3a(8) =5a(9) =7a(10) =13a(11) =43a(12) =113a(13) =521a(14) =1241a(15) =3681a(16) =23657a(17) =177721a(18) =679505a(19) =4674203a(20) =27273277a(21) =275517767a(22) =3496390229a(23) =37043734803a(24) =226196947873

External references