Numbers n such that sigma(n) = sigma(n-1) - sigma(n-2).

Terms

a(0) =955a(1) =1301a(2) =11143a(3) =38215a(4) =89485a(5) =152155a(6) =167785a(7) =254137a(8) =303281a(9) =473317a(10) =574717a(11) =813921a(12) =918081a(13) =1307023a(14) =2008361a(15) =3676243a(16) =9878245a(17) =10368513a(18) =12548755a(19) =19411481a(20) =22493263a(21) =42413485a(22) =77766487a(23) =81513817a(24) =157874001a(25) =240828973