A337425 - OEIS

A337425

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.

%I #6 Aug 28 2020 11:04:29

%S 0,23,113,563,1013,1823,70313,351563,82013,410063,43945313,1328603,

%T 18452813,1977539063,0,830376563,538084013,968551223,13452100313,

%U 1441625976563,43584805013,2145767211914063,0,0,9806581127813,6354664570823,681012578320313,441296150751563,0

%N 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.

%Y Cf. A093625, A076481, A337423, A337424, A337426.

%K nonn

%O 2,2

%A _Hugo Pfoertner_, Aug 27 2020