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A028492 Similarity classes of triangles which can be drawn using the lattice points in an n X n grid for vertices. 2
0, 1, 6, 20, 55, 119, 229, 402, 667, 1019, 1536, 2216, 3049, 4168, 5546, 7203, 9278, 11755, 14597, 18054, 22138, 26625, 31958, 38120, 44821, 52764, 61663, 71204, 82250, 94479, 107680, 122740, 139224, 156699, 176450, 198176, 220883 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
Sean A. Irvine, Java program (github)
D. Rusin, Lattice Problem (Triangles) [Broken link]
D. Rusin, Lattice Problem (Triangles) [Cached copy]
CROSSREFS
Cf. A028419.
Sequence in context: A298408 A038091 A027993 * A059822 A213589 A152959
KEYWORD
nonn
AUTHOR
EXTENSIONS
Extended by Ray Chandler, May 03 2011
STATUS
approved

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Last modified March 19 01:57 EDT 2024. Contains 370952 sequences. (Running on oeis4.)