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A189811 Number of right triangles on a (n+1)X7 grid 1
94, 330, 732, 1308, 2060, 2960, 4032, 5250, 6604, 8082, 9684, 11388, 13220, 15144, 17156, 19268, 21484, 23784, 26176, 28656, 31236, 33900, 36648, 39480, 42404, 45420, 48520, 51704, 54972, 58324, 61768, 65296, 68908, 72604, 76384, 80248, 84200, 88236 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A189814

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

FORMULA

Empirical: a(n) = 42*n^2 + 886*n - 6080 for n>35

EXAMPLE

Some solutions for n=3

..3..3....1..4....3..3....1..2....2..3....3..3....0..3....2..4....2..5....1..3

..0..3....0..5....1..3....0..2....0..3....2..3....0..4....1..4....1..5....0..1

..3..4....2..5....3..5....1..4....2..5....3..2....3..3....2..2....2..2....3..2

CROSSREFS

Sequence in context: A107412 A115996 A188185 * A202415 A174337 A354481

Adjacent sequences:  A189808 A189809 A189810 * A189812 A189813 A189814

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 28 2011

STATUS

approved

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Last modified November 26 11:03 EST 2022. Contains 358357 sequences. (Running on oeis4.)