GCD-convolution of squares A000290 with themselves.

Terms

a(0) =1a(1) =2a(2) =6a(3) =4a(4) =19a(5) =6a(6) =28a(7) =24a(8) =45a(9) =10a(10) =98a(11) =12a(12) =79a(13) =94a(14) =120a(15) =16a(16) =201a(17) =18a(18) =238a(19) =164a(20) =171a(21) =22a(22) =436a(23) =120a(24) =229a(25) =234a(26) =426a(27) =28a(28) =695a(29) =30