Least positive integer k such that prime(k*n) - 1 = (prime(i*n)-1)*(prime(j*n)-1) for some integers 0 < i < j < k.

A257938

Least positive integer k such that prime(k*n) - 1 = (prime(i*n)-1)*(prime(j*n)-1) for some integers 0 < i < j < k.

Terms

    a(0) =6a(1) =3a(2) =8a(3) =71a(4) =12a(5) =14a(6) =105a(7) =221a(8) =24a(9) =499a(10) =261a(11) =612a(12) =1341a(13) =175a(14) =917a(15) =549a(16) =1351a(17) =2303a(18) =2273a(19) =4767a(20) =364a(21) =1395a(22) =1390a(23) =1431a(24) =6481a(25) =2479a(26) =918a(27) =2412a(28) =17783a(29) =3178

External references