A394637 - OEIS

%I #10 Apr 03 2026 07:30:31

%S 28,136,176,196,208,260,268,292,328,356,416,476,520,560,584,616,656,

%T 688,716,808,836,928,980,1016,1120,1168,1184,1228,1288,1316,1364,1436,

%U 1540,1616,1720,1820,1876,1904,1948,2024,2036,2096,2140,2176,2336,2368,2380,2420

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

%C A subsequence of A333020.

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

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

%K nonn

%O 1,1

%A _Jud McCranie_, Mar 28 2026