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