Triangle read by rows: absolute values of odd-numbered rows of A225434.

Terms

a(0) =1a(1) =1a(2) =58a(3) =1a(4) =1a(5) =1556a(6) =12006a(7) =1556a(8) =1a(9) =1a(10) =39054a(11) =1461615a(12) =5647300a(13) =1461615a(14) =39054a(15) =1a(16) =1a(17) =976552a(18) =135028828a(19) =1838120344a(20) =4873361350a(21) =1838120344a(22) =135028828a(23) =976552a(24) =1a(25) =1a(26) =24414050a(27) =11462721645a(28) =414730580760a(32) =414730580760