Squares of even hexagonal numbers.

Terms

a(0) =36a(1) =784a(2) =4356a(3) =14400a(4) =36100a(5) =76176a(6) =142884a(7) =246016a(8) =396900a(9) =608400a(10) =894916a(11) =1272384a(12) =1758276a(13) =2371600a(14) =3132900a(15) =4064256a(16) =5189284a(17) =6533136a(18) =8122500a(19) =9985600a(20) =12152196a(21) =14653584a(22) =17522596a(23) =20793600a(24) =24502500a(25) =28686736