A318957 Numbers k such that A194113(k) is a prime.

1, 13, 26, 29, 31, 44, 45, 50, 66, 69, 102, 106, 125, 177, 182, 183, 196, 198, 230, 238, 266, 278, 279, 287, 291, 299, 309, 315, 333, 334, 338, 343, 347, 367, 385, 390, 398, 415, 423, 431, 436, 451, 455, 458, 473, 487, 491, 493, 512, 517, 518, 522, 529, 539, 542, 545, 557, 566, 589

Offset: 1

Author

Marius A. Burtea, Sep 24 2018

Keywords

• nonn

Examples

			For k=1, A194113(1)=3;
for k=13, A194113(13)=281;
for k=26, A194113(26)=1097.
		

Crossrefs

Cf. A194113.

Programs

PARI

isok(n) = isprime(sum(k=1, n, floor(k*sqrt(10)))); \\ Michel Marcus, Sep 26 2018