Square root of floor(A055812(n) / 5).

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =3a(5) =4a(6) =8a(7) =21a(8) =55a(9) =72a(10) =144a(11) =377a(12) =987a(13) =1292a(14) =2584a(15) =6765a(16) =17711a(17) =23184a(18) =46368a(19) =121393a(20) =317811a(21) =416020a(22) =832040a(23) =2178309a(24) =5702887a(25) =7465176