A289221 Areas of integer-sided triangles whose area equals 5 times their perimeter.

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

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