A394638 Start of exactly four even numbers that are totient numbers (A002202).

78, 126, 342, 378, 438, 1086, 1300, 1422, 1566, 1996, 2058, 3078, 3318, 3916, 3942, 4000, 4446, 4636, 4966, 4998, 5166, 5476, 6802, 7600, 8286, 8418, 8778, 8860, 9318, 9738, 10158, 10660, 11238, 12342, 13098, 13120, 13156, 13326, 13686, 13900, 14080, 15438, 16878

Offset

1,1

Comments

Subsequence of A333021.

Links

Table of n, a(n) for n=1..43.

Example

78, 80, 82, and 84 are totient numbers but 76 and 86 are not so 78 is a term.

Crossrefs

Cf. A002202, A333021, A393544, A394635, A394636, A394637, A394639, A394640.

Sequence in context: A224666 A161596 A275218 * A260364 A185077 A042945

Adjacent sequences: A394635 A394636 A394637 * A394639 A394640 A394642

Keyword

nonn

Author

Jud McCranie, Mar 29 2026

Status

approved