Square numbers which equal a triangular number times an odd number between 1 and 15.

Terms

a(0) =1a(1) =9a(2) =36a(3) =196a(4) =225a(5) =324a(6) =900a(7) =1225a(8) =4225a(9) =11025a(10) =41616a(11) =53361a(12) =88209a(13) =108900a(14) =176400a(15) =324900a(16) =374544a(17) =1413721a(18) =8643600a(19) =12723489a(20) =43956900a(21) =48024900a(22) =52490025a(23) =158407396a(24) =432224100a(25) =468506025a(26) =846984609a(27) =1631432881