Entries of A336938 without duplicates.

Terms

a(0) =0a(1) =4a(2) =16a(3) =52a(4) =160a(5) =9232a(6) =13120a(7) =39364a(8) =41524a(9) =250504a(10) =1276936a(11) =6810136a(12) =8153620a(13) =27114424a(14) =50143264a(15) =106358020a(16) =121012864a(17) =593279152a(18) =1570824736a(19) =2482111348a(20) =2798323360a(21) =17202377752a(22) =24648077896a(23) =52483285312a(24) =56991483520a(25) =90239155648a(26) =139646736808