The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A293556 Records in A243822. 2
 0, 1, 2, 4, 10, 11, 14, 15, 16, 20, 21, 29, 52, 61, 64, 72, 91, 99, 100, 121, 142, 151, 156, 251, 263, 281, 290, 334, 347, 404, 415, 441, 455, 503, 519, 521, 581, 595, 627, 645, 695, 1097, 1160, 1189, 1193, 1221, 1242, 1430, 1501, 1535, 1683, 1760, 1849, 2048 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS See A293555 for comments, linked tables, and conjecture. - Michael De Vlieger, Nov 17 2017 LINKS Michael De Vlieger, Table of n, a(n) for n = 1..110 MATHEMATICA With[{s = Table[Count[Range@ n, _?(PowerMod[n, #, #] == 0 &)] - DivisorSigma[0, n], {n, 10^4}]}, Union@ FoldList[Max, s]] (* Michael De Vlieger, Oct 22 2017 *) CROSSREFS Cf. A000005, A010846, A243822, A244053, A293555. Sequence in context: A243622 A178713 A136818 * A029984 A101519 A227204 Adjacent sequences:  A293553 A293554 A293555 * A293557 A293558 A293559 KEYWORD nonn AUTHOR Michael De Vlieger, Oct 22 2017 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified August 4 17:55 EDT 2021. Contains 346455 sequences. (Running on oeis4.)