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A363554 a(1) = 1; for n > 1, a(n) is the smallest positive integer such that both the gradients and y-intercepts of the lines between any two points (i, a(i)) and (j, a(j)) are distinct. 1
1, 1, 2, 5, 11, 4, 3, 18, 26, 35, 48, 66, 16, 99, 129, 27, 67, 149, 190, 8, 235, 259, 285, 348, 276, 34, 24, 97, 362, 170, 155, 15, 504, 464, 9, 639, 449, 173, 391, 768, 577, 682, 836, 937, 598, 438, 94, 6, 1063, 1007, 500, 210, 1146, 1303, 1390, 806, 1530, 62, 1096, 1739, 212, 28, 1001, 1380 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
This is a variation of A286091 where the y-intercepts of all lines are also distinct.
LINKS
EXAMPLE
a(12) = 66. A value of 15, with coordinate (12,15), for this term would create a point for which all line gradients are distinct, see A286091, but it creates a line that passes through the origin with a(4), a point with coordinate (4,5). However the terms a(3), at coordinate (3,2) and a(6), at coordinate (6,4), have already created a line that passes through the origin, thus a(12) cannot be 15. The coordinate (12,66) is the first point the leads to all lines and y-intercepts being distinct.
CROSSREFS
Sequence in context: A175311 A246208 A286091 * A127011 A170868 A357588
KEYWORD
nonn
AUTHOR
Scott R. Shannon, Jun 10 2023
STATUS
approved

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Last modified March 3 17:29 EST 2024. Contains 370512 sequences. (Running on oeis4.)