Number of distinct products i*j with 0 <= i, j <= n-th prime.

Terms

a(0) =4a(1) =7a(2) =15a(3) =26a(4) =54a(5) =73a(6) =115a(7) =143a(8) =200a(9) =297a(10) =340a(11) =461a(12) =559a(13) =619a(14) =731a(15) =904a(16) =1098a(17) =1178a(18) =1393a(19) =1556a(20) =1652a(21) =1912a(22) =2103a(23) =2391a(24) =2785a(25) =3008a(26) =3150a(27) =3392a(28) =3535a(29) =3789