Square numbers which are the sum of distinct double factorials (A006882).

Terms

a(0) =1a(1) =4a(2) =9a(3) =16a(4) =25a(5) =49a(6) =64a(7) =121a(8) =169a(9) =400a(10) =441a(11) =961a(12) =1444a(13) =3844a(14) =3969a(15) =4225a(16) =4356a(17) =4900a(18) =5184a(19) =10404a(20) =11449a(21) =11881a(22) =14400a(23) =15625a(24) =47089a(25) =47524a(26) =56644a(27) =57600a(28) =139129a(29) =145924