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A333022 Starts of runs of 5 consecutive even numbers that are all totient numbers (A002202). 6
2, 4, 16, 40, 52, 100, 102, 104, 160, 220, 460, 498, 500, 856, 880, 1276, 1480, 1660, 1804, 2200, 2236, 3016, 3160, 3460, 4516, 4780, 5500, 5920, 6040, 6196, 6820, 7240, 7636, 7696, 7720, 8536, 8620, 9196, 9460, 9880, 10456, 12916, 13756, 13960, 14416, 15640 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

Wikipedia, Totient numbers.

EXAMPLE

2 is a term since 2, 4, 6, 8 and 10 are all totient numbers.

PROG

(PARI) m = 5; v = vector(m); for(k=1, m, v[k] = istotient(2*k)); for(k = m+1, 7500, if(Set(v) == [1], print1(2*(k-m), ", ")); v = concat(v[2..m], istotient(2*k)))

CROSSREFS

Cf. A000010, A002202, A005277, A063512, A083533, A333019, A333020, A333021, A333023, A333024.

Sequence in context: A296297 A290265 A223093 * A048222 A192890 A062330

Adjacent sequences:  A333019 A333020 A333021 * A333023 A333024 A333025

KEYWORD

nonn

AUTHOR

Amiram Eldar, Mar 05 2020

STATUS

approved

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Last modified July 31 07:38 EDT 2021. Contains 346369 sequences. (Running on oeis4.)