a(n) = A348773(2*n).

Terms

a(0) =42a(1) =1321a(2) =2352a(3) =2924a(4) =77922a(5) =4822a(6) =2310a(7) =81212a(8) =19730a(9) =331637a(10) =340640a(11) =11158a(12) =13838a(13) =13690a(14) =14476a(15) =709992a(16) =17990a(17) =19518a(18) =20830a(19) =2277394a(20) =62350a(21) =82484a(22) =76962a(23) =84852a(24) =15407670a(25) =87388a(26) =90636a(27) =408240a(28) =14526794a(29) =7023466