Semiprimes of the form p*q where p < q such that q divides p^(q+1) + 1 and (q-p)^(q+1) + 1.

A278921

Semiprimes of the form p*q where p < q such that q divides p^(q+1) + 1 and (q-p)^(q+1) + 1.

Terms

    a(0) =10a(1) =15a(2) =65a(3) =221a(4) =493a(5) =671a(6) =1147a(7) =1219a(8) =3439a(9) =5069a(10) =12209a(11) =14893a(12) =20737a(13) =24503a(14) =30083a(15) =49813a(16) =61937a(17) =77507a(18) =91277a(19) =97297a(20) =100337a(21) =102719a(22) =109283a(23) =109783a(24) =113521a(25) =132427a(26) =144301a(27) =178991a(28) =204851a(29) =244523

External references