A267103 Row 3 of A265903; numbers that occur exactly three times in A004001.

4, 15, 27, 30, 48, 54, 57, 61, 86, 96, 102, 105, 112, 115, 119, 124, 157, 172, 182, 188, 191, 202, 208, 211, 218, 221, 225, 233, 236, 240, 245, 251, 293, 314, 329, 339, 345, 348, 364, 374, 380, 383, 394, 400, 403, 410, 413, 417, 429, 435, 438, 445, 448, 452, 460, 463, 467, 472, 481, 484, 488, 493, 499, 506, 558

Offset: 1

Author

Antti Karttunen, Jan 18 2016

Keywords

• nonn

Comments

Numbers n for which A051135(n) = 3.

Links

• Antti Karttunen, Table of n, a(n) for n = 1..8192

Crossrefs

Column 3 of A265901, row 3 of A265903.

Cf. A004001, A051135, A087686, A188163, A266109.

Formula

a(n) = A087686(1+A266109(n)) = A087686(1+A087686(1+A188163(n))).