A009096 Ordered perimeters of Pythagorean triangles, listed with multiplicity.

12, 24, 30, 36, 40, 48, 56, 60, 60, 70, 72, 80, 84, 84, 90, 90, 96, 108, 112, 120, 120, 120, 126, 132, 132, 140, 144, 144, 150, 154, 156, 160, 168, 168, 168, 176, 180, 180, 180, 182, 192, 198, 200, 204, 208, 210, 210, 216, 220, 224, 228, 234, 240, 240, 240, 240, 252, 252

Offset: 1

Author

David W. Wilson

Keywords

• nonn

Examples

			The perimeters are listed with multiplicity, for example a(8) = a(9) = 60 = 15 + 20 + 25 = 10 + 24 + 26. - _M. F. Hasler_, Jul 04 2025
		

Links

• Ron Knott, Pythagorean Triples and Online Calculators
• Index entries related to Pythagorean Triples.

Crossrefs

Cf. A103605 (the corresponding triples), A024364 (perimeters of primitive Pythagorean triangles).

Formula

a(n) = A103605(3n) + A103605(3n-1) + A103605(3n-2). - M. F. Hasler, Jul 04 2025

Extensions

Name clarified by M. F. Hasler, Jul 04 2025