Numbers n such that sigma(n)+d(n) and sigma(n+1)+d(n+1) are perfect squares.

Terms

a(0) =61a(1) =2369a(2) =4469a(3) =8460a(4) =13208a(5) =44790a(6) =162734a(7) =281560a(8) =283938a(9) =334469a(10) =500465a(11) =533045a(12) =609953a(13) =871853a(14) =962247a(15) =1317885a(16) =1741445a(17) =1792745a(18) =2499845a(19) =3013246a(20) =4099031a(21) =5646629a(22) =7009389a(23) =7012135a(24) =8396781a(25) =8740480a(26) =8822093a(27) =11146381a(28) =11957693a(29) =15002679