a(n) = Sum_k k*A333274(n,k).

Terms

a(0) =12a(1) =50a(2) =152a(3) =346a(4) =732a(5) =1294a(6) =2232a(7) =3546a(8) =5428a(9) =7806a(10) =11136a(11) =15226a(12) =20676a(13) =27150a(14) =35048a(15) =44386a(16) =56044a(17) =69302a(18) =85480a(19) =103882a(20) =125180a(21) =148942a(22) =176968a(23) =208034a(24) =243772a(25) =283014a(26) =327272a(27) =375826a(28) =431212a(29) =490918