Triangle read by rows: Related to the Euler numbers.

Terms

a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =5a(6) =0a(7) =1a(8) =19a(9) =61a(10) =0a(11) =1a(12) =42a(13) =498a(14) =1385a(15) =0a(16) =1a(17) =74a(18) =1932a(19) =19238a(20) =50521a(21) =0a(22) =1a(23) =115a(24) =5290a(25) =114830a(26) =1057475a(27) =2702765a(28) =0a(29) =1