Numbers such that k is the altitude of a Heronian triangle with sides m-13, m, m+13.

Terms

a(0) =9a(1) =24a(2) =39a(3) =60a(4) =105a(5) =156a(6) =231a(7) =396a(8) =585a(9) =864a(10) =1479a(11) =2184a(12) =3225a(13) =5520a(14) =8151a(15) =12036a(16) =20601a(17) =30420a(18) =44919a(19) =76884a(20) =113529a(21) =167640a(22) =286935a(23) =423696a(24) =625641a(25) =1070856a(26) =1581255a(27) =2334924a(28) =3996489a(29) =5901324