a(n) = A249670(A003961(n)).

Terms

a(0) =1a(1) =12a(2) =30a(3) =117a(4) =56a(5) =40a(6) =132a(7) =1080a(8) =775a(9) =672a(10) =182a(11) =390a(12) =306a(13) =176a(14) =1680a(15) =9801a(16) =380a(17) =9300a(18) =552a(19) =6552a(20) =3960a(21) =2184a(22) =870a(23) =144a(24) =2793a(25) =408a(26) =19500a(27) =1716a(28) =992a(29) =2240