p-INVERT of the positive squares, where p(S) = 1 - S^2.

Terms

a(0) =0a(1) =1a(2) =8a(3) =35a(4) =120a(5) =392a(6) =1336a(7) =4725a(8) =16792a(9) =59191a(10) =207536a(11) =727440a(12) =2553264a(13) =8968569a(14) =31502248a(15) =110627195a(16) =388451624a(17) =1364010648a(18) =4789766120a(19) =16819647565a(20) =59063332152a(21) =207403715119a(22) =728306773600