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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. 4
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 17 12:55 EDT 2021. Contains 343971 sequences. (Running on oeis4.)