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 A289221 Areas of integer-sided triangles whose area equals 5 times their perimeter. 5
 540, 600, 630, 660, 750, 810, 840, 900, 930, 1050, 1080, 1320, 1380, 1500, 1560, 1590, 1740, 2040, 2070, 2280, 2310, 2520, 2580, 2970, 3150, 3240, 3720, 4020, 4350, 4530, 4620, 5460, 6270, 6300, 7260, 7560, 7800, 7980, 11730, 12210, 14040, 18870, 22260, 27030, 27300, 52530, 103020 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS There are no further terms. LINKS Table of n, a(n) for n=1..47. EXAMPLE The areas 540,600,630,660,750, ... pertain respectively to triangles with sides (30,39,39), (30,40,50), (28,45,53), (26,51,55), (25,60,65)...., equal 5 times their perimeter 108,120,126,132,150,... CROSSREFS Cf. A098030, A289218, A289219, A289220. A row of the triangle in A290451. Sequence in context: A118630 A184546 A252386 * A345390 A261290 A253463 Adjacent sequences: A289218 A289219 A289220 * A289222 A289223 A289224 KEYWORD fini,full,nonn AUTHOR Zhining Yang, Jun 28 2017 STATUS approved

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Last modified June 18 20:31 EDT 2024. Contains 373486 sequences. (Running on oeis4.)