a(n) is the sum of all possible pairs of the first n primes.

Terms

a(0) =4a(1) =15a(2) =40a(3) =85a(4) =168a(5) =287a(6) =464a(7) =693a(8) =1000a(9) =1419a(10) =1920a(11) =2561a(12) =3332a(13) =4215a(14) =5248a(15) =6477a(16) =7920a(17) =9519a(18) =11360a(19) =13419a(20) =15664a(21) =18193a(22) =20976a(23) =24075a(24) =27560a(25) =31347a(26) =35392a(27) =39759a(28) =44400a(29) =49383