a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-1)*a(1) for n >= 5, with a(1) = 1, a(2) = a(3) = 0, a(4) = 1.

A025276

a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-1)*a(1) for n >= 5, with a(1) = 1, a(2) = a(3) = 0, a(4) = 1.

Terms

    a(0) =1a(1) =0a(2) =0a(3) =1a(4) =2a(5) =4a(6) =8a(7) =17a(8) =38a(9) =88a(10) =208a(11) =498a(12) =1204a(13) =2936a(14) =7216a(15) =17861a(16) =44486a(17) =111408a(18) =280352a(19) =708526a(20) =1797564a(21) =4576472a(22) =11688496a(23) =29939786a(24) =76894684a(25) =197974480a(26) =510864480a(27) =1321031716a(28) =3422685992a(29) =8884010928

External references