Triangle read by rows related to double factorial of odd numbers (A001147).

Terms

a(0) =1a(1) =0a(2) =1a(3) =1a(4) =0a(5) =2a(6) =0a(7) =11a(8) =0a(9) =4a(10) =25a(11) =0a(12) =72a(13) =0a(14) =8a(15) =0a(16) =589a(17) =0a(18) =340a(19) =0a(20) =16a(21) =2025a(22) =0a(23) =7010a(24) =0a(25) =1328a(26) =0a(27) =32a(28) =0a(29) =75319