Numbers k such that k is the altitude of a Heronian triangle with sides m - 11, m, m + 11.

Terms

a(0) =12a(1) =15a(2) =33a(3) =63a(4) =72a(5) =132a(6) =240a(7) =273a(8) =495a(9) =897a(10) =1020a(11) =1848a(12) =3348a(13) =3807a(14) =6897a(15) =12495a(16) =14208a(17) =25740a(18) =46632a(19) =53025a(20) =96063a(21) =174033a(22) =197892a(23) =358512a(24) =649500a(25) =738543a(26) =1337985a(27) =2423967a(28) =2756280a(29) =4993428