a(n) = (n - 1) * Sum_{k=2..n} A000010(k).

Terms

a(0) =0a(1) =1a(2) =6a(3) =15a(4) =36a(5) =55a(6) =102a(7) =147a(8) =216a(9) =279a(10) =410a(11) =495a(12) =684a(13) =819a(14) =994a(15) =1185a(16) =1520a(17) =1717a(18) =2142a(19) =2413a(20) =2780a(21) =3129a(22) =3762a(23) =4117a(24) =4776a(25) =5275a(26) =5954a(27) =6507a(28) =7532a(29) =8033