OFFSET
1,3
LINKS
Max Alekseyev, Table of n, a(n) for n = 1..400
Max Alekseyev, Sage program for lines covering points, Github, Aug 19 2024
Rémy Sigrist, PARI program
N. J. A. Sloane, A Nasty Surprise in a Sequence and Other OEIS Stories, Experimental Mathematics Seminar, Rutgers University, Oct 10 2024, Youtube video; Slides [Mentions this sequence]
EXAMPLE
The initial terms, together with an appropriate set of lines, are:
1 1 [1]
2 1 [x]
3 2 [2, x]
4 2 [2, (2/3)*x + 1/3]
5 2 [2, (2/3)*x + 1/3]
6 3 [2, 2*x - 8, (2/3)*x + 1/3]
7 3 [2, 2*x - 8, (2/3)*x + 1/3]
8 3 [2, 4, (2/3)*x + 1/3]
9 4 [2, 3, 4, x]
10 4 [2, 3, 4, x]
11 4 [2, 3, 4, x]
12 4 [2, 3, 4, (5/11)*x + 6/11]
13 4 [2, 3, 4, (5/11)*x + 6/11]
14 4 [2, 3, 4, (5/11)*x + 6/11]
15 4 [2, 3, 4, (5/11)*x + 6/11]
16 5 [2, 3, 4, 4*x - 42, (4/15)*x + 11/15]
17 5 [2, 3, 4, 4*x - 42, (4/15)*x + 11/15]
18 5 [2, 3, 4, 6, (4/15)*x + 11/15]
PROG
(PARI) \\ See Links section.
CROSSREFS
KEYWORD
nonn
AUTHOR
Rémy Sigrist and N. J. A. Sloane, Aug 18 2024
EXTENSIONS
Terms a(30) onward from Max Alekseyev, Aug 18 2024
STATUS
approved