a(n) = n-th row common denominator of A321121.

Terms

a(0) =4a(1) =2a(2) =3a(3) =8a(4) =36a(5) =96a(6) =44a(7) =360a(8) =492a(9) =448a(10) =1836a(11) =5016a(12) =2284a(13) =18720a(14) =25572a(15) =23288a(16) =95436a(17) =260736a(18) =118724a(19) =973080a(20) =1329252a(21) =1210528a(22) =4960836a(23) =13553256a(24) =6171364a(25) =50581440a(26) =69095532a(27) =62924168a(28) =257868036a(29) =704508576