login
A124128
Numbers k such that A001372(k) is prime.
0
2, 3, 4, 5, 34, 51, 192, 206, 293, 1983
OFFSET
1,1
EXAMPLE
2 is a term because A001372(2) = 3 is prime.
CROSSREFS
Cf. A001372 (number of endofunctions on n points).
Sequence in context: A086130 A024636 A004845 * A286902 A037401 A062509
KEYWORD
nonn,less,hard,more
AUTHOR
Jonathan Vos Post, Nov 29 2006
EXTENSIONS
a(7) corrected and a(9) from Sean A. Irvine, Jan 16 2021
a(10) from Daniel Suteu, Jan 16 2021
STATUS
approved