a(n) = (k+1)*n + k*(k+1)/2, where k = A332542(n).

Terms

a(0) =12a(1) =60a(2) =180a(3) =30a(4) =70a(5) =1512a(6) =240a(7) =60a(8) =176a(9) =462a(10) =663a(11) =234a(12) =105a(13) =1008a(14) =36720a(15) =408a(16) =532a(17) =2660a(18) =168a(19) =297a(20) =782a(21) =2070a(22) =480a(23) =900a(24) =390a(25) =252a(26) =6264a(27) =1218a(28) =1426a(29) =491040