a(n) gives one fourth of the even leg of one of the two Pythagorean triangles with hypotenuse A080109(n) = A002144(n)^2. The odd leg is given in A253802(n).
A253803
a(n) gives one fourth of the even leg of one of the two Pythagorean triangles with hypotenuse A080109(n) = A002144(n)^2. The odd leg is given in A253802(n).
Terms
- a(0) =6a(1) =39a(2) =60a(3) =210a(4) =210a(5) =410a(6) =630a(7) =915a(8) =1320a(9) =1780a(10) =2340a(11) =990a(12) =2730a(13) =3164a(14) =4620a(15) =5215a(16) =5610a(17) =4290a(18) =8145a(19) =8106a(20) =2730a(21) =6630a(22) =12116a(23) =12540a(24) =4080a(25) =17485a(26) =17451a(27) =18480a(28) =9690a(29) =24414
External references
- oeis: A253803