A383890 Index of record gaps between totient numbers.

1, 2, 7, 30, 85, 257, 1031, 2493, 3288, 7604, 13392, 22663, 26818, 31377, 110175, 186971, 400432, 890621, 1536566, 17176199, 27501485, 102834105, 173246634, 182261294, 214104745, 268935021, 1781734397, 4010389565, 6213586719, 14327327647, 41945219525, 46226079444

Offset

1,2

Comments

Values of k such that A002202(k+1) - A002202(k) > A002202(i+1) - A002202(i) for all i<k. The gaps are in A383889.

Links

Table of n, a(n) for n=1..32.

Example

A002202(8)-A002202(7) = 4, which is greater than A002202(i+i)-A002202(i) for all i<7, so 7 is in the sequence.

Crossrefs

Cf. A000010, A002202, A083533, A383889.

Sequence in context: A270526 A037417 A042913 * A041805 A173233 A074416

Adjacent sequences: A383887 A383888 A383889 * A383891 A383892 A383893

Keyword

nonn

Author

Jud McCranie, May 13 2025

Extensions

a(30)-a(32) from Jud McCranie, Jan 20 2026.

Status

approved