Odd half-Zumkeller numbers.

Terms

a(0) =225a(1) =441a(2) =1225a(3) =2025a(4) =3969a(5) =5625a(6) =11025a(7) =18225a(8) =21609a(9) =27225a(10) =35721a(11) =38025a(12) =50625a(13) =53361a(14) =65025a(15) =74529a(16) =81225a(17) =99225a(18) =119025a(19) =127449a(20) =140625a(21) =148225a(22) =159201a(23) =164025a(24) =184041a(25) =189225a(26) =194481a(27) =207025a(28) =216225a(29) =233289