This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A386201 #4 Jul 14 2025 22:52:30 %S A386201 12,4,24,40,112,264,684,1740,4512,11704,30504,79600,208012,543924, %T A386201 1422984,3723720,9746112,25511224,66782124,174826300,457682512, %U A386201 1198198104,3136874424,8212364640,21500121612,56287841764,147363147384,385801185640,1010039738512 %N A386201 Lengths of the long leg in the unique primitive Pythagorean triple whose inradius is A000032(n) and such that its long leg and its hypotenuse are consecutive natural numbers. %F A386201 a(n) = 2 * A000032(n) * (A000032(n) + 1). %Y A386201 Cf. A000032, A380821 (short legs). %K A386201 nonn,easy %O A386201 0,1 %A A386201 _Miguel-Ángel Pérez García-Ortega_, Jul 14 2025