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A189810 Number of right triangles on a (n+1)X6 grid 1
68, 238, 524, 926, 1444, 2060, 2784, 3596, 4492, 5470, 6516, 7630, 8820, 10070, 11380, 12758, 14204, 15710, 17276, 18902, 20596, 22350, 24164, 26038, 27972, 29970, 32028, 34146, 36324, 38562, 40860, 43218, 45636, 48114, 50652, 53250, 55908, 58626, 61404 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A189814
LINKS
FORMULA
Empirical: a(n) = 30*n^2 + 468*n - 2478 for n>24
EXAMPLE
Some solutions for n=3
..3..5....0..3....3..4....0..0....2..5....3..1....3..3....1..2....3..2....1..2
..0..5....0..2....1..4....0..3....1..5....0..1....0..3....1..3....0..0....1..5
..3..0....1..3....3..0....3..0....2..2....3..4....3..1....2..2....1..5....2..2
CROSSREFS
Sequence in context: A044781 A317807 A292344 * A200198 A237745 A237740
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 28 2011
STATUS
approved

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Last modified May 22 06:48 EDT 2024. Contains 372743 sequences. (Running on oeis4.)