Column 1 of A277810: a(n) = A019565(A065621(n)).

Terms

a(0) =2a(1) =3a(2) =30a(3) =5a(4) =70a(5) =105a(6) =42a(7) =7a(8) =154a(9) =231a(10) =2310a(11) =385a(12) =110a(13) =165a(14) =66a(15) =11a(16) =286a(17) =429a(18) =4290a(19) =715a(20) =10010a(21) =15015a(22) =6006a(23) =1001a(24) =182a(25) =273a(26) =2730a(27) =455a(28) =130a(29) =195