Semiprimes of the form S(n) + T(n) where S(n) and T(n) are the n-th square and the n-th triangular numbers.

A240914

Semiprimes of the form S(n) + T(n) where S(n) and T(n) are the n-th square and the n-th triangular numbers.

Terms

    a(0) =15a(1) =26a(2) =57a(3) =77a(4) =155a(5) =187a(6) =301a(7) =551a(8) =737a(9) =1027a(10) =1457a(11) =1751a(12) =3197a(13) =3337a(14) =5251a(15) =6767a(16) =7597a(17) =8251a(18) =13301a(19) =22387a(20) =24257a(21) =25807a(22) =32047a(23) =34277a(24) =41417a(25) =41917a(26) =48151a(27) =61307a(28) =63757a(29) =66887

External references