A386291 Long leg of the unique primitive Pythagorean triple whose inradius is A000108(n) and such that its long leg and its hypotenuse are consecutive natural numbers.

4, 4, 12, 60, 420, 3612, 35112, 368940, 4092660, 47287812, 564244824, 6911705164, 86538400312, 1103802305800, 14305263976080, 187980058537740, 2500329726373140, 33615543407577780, 456277456430657400, 6246438368992478580, 86175353789650193640

Offset

0,1

Links

Table of n, a(n) for n=0..20.

Formula

a(n) = 2 * A000108(n) * (A000108(n) + 1).

Crossrefs

Cf. A000108, A383251.

Sequence in context: A038804 A183362 A387551 * A353615 A088838 A367688

Adjacent sequences: A386288 A386289 A386290 * A386292 A386293 A386294

Keyword

nonn,easy

Author

Miguel-Ángel Pérez García-Ortega, Jul 17 2025

Status

approved