A073582 - OEIS

A073582

Numbers k such that S(k) = k/2, where S(k) is the Kempner function A002034.

6, 8, 10, 14, 22, 26, 34, 38, 46, 58, 62, 74, 82, 86, 94, 106, 118, 122, 134, 142, 146, 158, 166, 178, 194, 202, 206, 214, 218, 226, 254, 262, 274, 278, 298, 302, 314, 326, 334, 346, 358, 362, 382, 386, 394, 398, 422, 446, 454, 458, 466, 478, 482, 502, 514

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Unique sequence such that A033677(a(m))-A033676(a(m)) approaches a(m)/2. - Joseph Biberstine, Dec 25 2004

Numbers k such that A000203(k) = 3 + k/2 + k. - Melvin Peralta, Aug 15 2016

Is this sequence "Twice the odd primes and 8"? - Joerg Arndt, Sep 13 2016

LINKS

Michel Marcus, Table of n, a(n) for n = 1..669

Wikipedia, Kempner function

MATHEMATICA

Select[Range@ 514, Function[n, m = 1; While[! Divisible[m!, n], m++]; m == n/2]] (* or *)