a(n) is the least prime of the form (3^j*5^k - 1)/2, j > 0, k > 0, j + k = n. a(n) = 0 if no such prime exists.

A337423

a(n) is the least prime of the form (3^j*5^k - 1)/2, j > 0, k > 0, j + k = n. a(n) = 0 if no such prime exists.

Terms

    a(0) =7a(1) =37a(2) =67a(3) =337a(4) =607a(5) =3037a(6) =15187a(7) =27337a(8) =49207a(9) =683437a(10) =0a(11) =131835937a(12) =659179687a(13) =19929037a(14) =35872267a(15) =228881835937a(16) =2491129687a(17) =0a(18) =0a(19) =311391210937a(21) =0a(22) =235357947067a(24) =0

External references