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

1,2

Links

Table of n, a(n) for n=1..59.

Example

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

Prog

(PARI) isok(n) = isprime(sum(k=1, n, sqrtint(10*k^2))); \\ Michel Marcus, Sep 26 2018

Crossrefs

Cf. A194113.

Sequence in context: A297279 A095781 A037974 * A356064 A180055 A383304

Adjacent sequences: A318954 A318955 A318956 * A318958 A318959 A318960

Keyword

nonn

Author

Marius A. Burtea, Sep 24 2018

Status

approved