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.

7, 37, 67, 337, 607, 3037, 15187, 27337, 49207, 683437, 0, 131835937, 659179687, 19929037, 35872267, 228881835937, 2491129687, 0, 0, 311391210937, 12013549804687, 0, 235357947067, 1176789735337, 0, 10591107618037, 52955538090187, 5675104819335937, 608185958862304687

Offset

2,1

Links

Table of n, a(n) for n=2..30.

Crossrefs

Cf. A093625, A076481, A337424, A337425, A337426.

Sequence in context: A221982 A104915 A089376 * A031395 A138906 A107938

Adjacent sequences: A337420 A337421 A337422 * A337424 A337425 A337426

Keyword

nonn

Author

Hugo Pfoertner, Aug 27 2020

Status

approved