Convolution triangle based on A001333(n), n >= 1.

Terms

a(0) =1a(1) =3a(2) =1a(3) =7a(4) =6a(5) =1a(6) =17a(7) =23a(8) =9a(9) =1a(10) =41a(11) =76a(12) =48a(13) =12a(14) =1a(15) =99a(16) =233a(17) =204a(18) =82a(19) =15a(20) =1a(21) =239a(22) =682a(23) =765a(24) =428a(25) =125a(26) =18a(27) =1a(28) =577a(29) =1935