OFFSET
1,1
COMMENTS
LINKS
FORMULA
A287170(n * a(n)) >= 4.
EXAMPLE
The first terms, alongside the corresponding runs, are:
n a(n) runs in n*a(n)
-- ---- --------------
1 1870 2, 5, 11, 17
2 935 2, 5, 11, 17
3 1729 3, 7, 13, 19
4 1045 2, 5, 11, 19
5 374 2, 5, 11, 17
6 2093 2-3, 7, 13, 23
7 494 2, 7, 13, 19
8 1235 2, 5, 13, 19
9 2639 3, 7, 13, 29
10 187 2, 5, 11, 17
11 170 2, 5, 11, 17
12 2737 2-3, 7, 17, 23
13 190 2, 5, 13, 19
14 247 2, 7, 13, 19
15 4301 3-5, 11, 17, 23
16 1265 2, 5, 11, 23
PROG
(PARI) See Links section.
CROSSREFS
KEYWORD
nonn,look
AUTHOR
Rémy Sigrist, Mar 14 2019
STATUS
approved