A256247 a(n) = sqrt(2*A256246(n) + prime(A256246(n))).

2, 5, 7, 23, 33, 51, 65, 97, 99, 111, 115, 133, 137, 141, 143, 161, 171, 175, 177, 199, 207, 237, 241, 253, 271, 273, 275, 287, 309, 313, 315, 337, 387, 417, 423, 429, 435, 481, 507, 513, 541, 543, 557, 561, 589, 591, 613, 625, 631, 639, 651, 661, 677, 679, 727, 745, 769, 773, 777, 789

Offset

1,1

Comments

Except for the first term, 2, all terms are odd.

Links

Zak Seidov, Table of n, a(n) for n = 1..252

Example

a(1) = 2 = sqrt(2*A256246(1) + prime(A256246(1))) = sqrt(2*1 + prime(1)) = sqrt(2*1+2) = sqrt(4),
a(2) = 5 = sqrt(2*6 + prime(6)) = sqrt(2*6+13) = sqrt(25).

Crossrefs

Cf. A000040 (primes), A256246.

Sequence in context: A175552 A279756 A103060 * A243595 A103807 A099228

Adjacent sequences: A256244 A256245 A256246 * A256248 A256249 A256250

Keyword

nonn

Author

Zak Seidov, Mar 20 2015

Status

approved