a(n) = prime(n)*prime(n+1) - prime(n) - prime(n+1).

Terms

a(0) =1a(1) =7a(2) =23a(3) =59a(4) =119a(5) =191a(6) =287a(7) =395a(8) =615a(9) =839a(10) =1079a(11) =1439a(12) =1679a(13) =1931a(14) =2391a(15) =3015a(16) =3479a(17) =3959a(18) =4619a(19) =5039a(20) =5615a(21) =6395a(22) =7215a(23) =8447a(24) =9599a(25) =10199a(26) =10811a(27) =11447a(28) =12095a(29) =14111