OFFSET
1,2
COMMENTS
Is this sequence unbounded?
LINKS
Rémy Sigrist, Table of n, a(n) for n = 1..10000
Rémy Sigrist, C++ program
Rémy Sigrist, PARI program
EXAMPLE
The first terms, alongside an appropriate set of points, are:
n a(n) Points
-- ---- --------------------------------------------------
1 1 (1,2)
2 2 (1,2), (2,3)
3 2 (1,2), (3,5)
4 3 (2,3), (3,5), (4,7)
5 2 (1,2), (5,11)
6 2 (1,2), (6,13)
7 3 (3,5), (5,11), (7,17)
8 3 (2,3), (5,11), (8,19)
9 4 (3,5), (5,11), (7,17), (9,23)
10 3 (6,13), (7,17), (10,29)
11 3 (8,19), (9,23), (11,31)
12 4 (6,13), (7,17), (10,29), (12,37)
13 5 (6,13), (7,17), (10,29), (12,37), (13,41)
14 4 (8,19), (9,23), (11,31), (14,43)
15 5 (8,19), (9,23), (11,31), (14,43), (15,47)
16 6 (6,13), (7,17), (10,29), (12,37), (13,41), (16,53)
PROG
(C++) // See Links section.
(PARI) \\ See Links section.
CROSSREFS
KEYWORD
nonn
AUTHOR
Rémy Sigrist, Aug 14 2024
STATUS
approved