A333024 Starts of runs of 7 consecutive even numbers that are all totient numbers (A002202).

100, 26734060, 3149734998, 12960114796, 15685683796, 24077884060, 36987943996, 38809984996, 62521251798, 76314338740, 319408651400

Offset

1,1

Links

Table of n, a(n) for n=1..11.

Wikipedia, Totient numbers.

Example

100 is a term since the 7 even numbers 100, 102, ... 112 are all totient numbers.

Prog

(PARI) m = 7; v = vector(m); for(k=1, m, v[k] = istotient(2*k)); for(k = m+1, 1.5e7, 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, A333022, A333023.

Sequence in context: A013855 A204576 A061890 * A126686 A279028 A282088

Adjacent sequences: A333021 A333022 A333023 * A333025 A333026 A333027

Keyword

nonn,more

Author

Amiram Eldar, Mar 05 2020

Extensions

a(9)-a(11) from Giovanni Resta, Mar 07 2020

Status

approved