Triangle read by rows in which the n-th row consists of the first n nonzero terms of A033312.

Terms

a(0) =1a(1) =1a(2) =5a(3) =1a(4) =5a(5) =23a(6) =1a(7) =5a(8) =23a(9) =119a(10) =1a(11) =5a(12) =23a(13) =119a(14) =719a(15) =1a(16) =5a(17) =23a(18) =119a(19) =719a(20) =5039a(21) =1a(22) =5a(23) =23a(24) =119a(25) =719a(26) =5039a(27) =40319a(28) =1a(29) =5