A394637 Start of exactly three even numbers that are totient numbers (A002202).

28, 136, 176, 196, 208, 260, 268, 292, 328, 356, 416, 476, 520, 560, 584, 616, 656, 688, 716, 808, 836, 928, 980, 1016, 1120, 1168, 1184, 1228, 1288, 1316, 1364, 1436, 1540, 1616, 1720, 1820, 1876, 1904, 1948, 2024, 2036, 2096, 2140, 2176, 2336, 2368, 2380, 2420

Offset

1,1

Comments

A subsequence of A333020.

Links

Table of n, a(n) for n=1..48.

Example

28, 30, and 32 are totient numbers but 26 and 34 are not, so 28 is in the sequence.

Crossrefs

Cf. A002202, A333020, A393544, A394635, A394636, A394638, A394639, A394640.

Sequence in context: A124956 A014705 A126415 * A187047 A201095 A239205

Adjacent sequences: A394633 A394635 A394636 * A394638 A394639 A394640

Keyword

nonn

Author

Jud McCranie, Mar 28 2026

Status

approved