a(n) = n*A007504(n)/2 = n*(sum of first n primes)/2.

Terms

a(0) =0a(1) =1a(2) =5a(3) =15a(4) =34a(5) =70a(6) =123a(7) =203a(8) =308a(9) =450a(10) =645a(11) =880a(12) =1182a(13) =1547a(14) =1967a(15) =2460a(16) =3048a(17) =3740a(18) =4509a(19) =5396a(20) =6390a(21) =7476a(22) =8701a(23) =10051a(24) =11556a(25) =13250a(26) =15093a(27) =17064a(28) =19194a(29) =21460