Numbers k such that sigma(k) = sigma(k+1)+sigma(k-1).

Terms

a(0) =954a(1) =1300a(2) =11142a(3) =38214a(4) =89484a(5) =152154a(6) =167784a(7) =254136a(8) =303280a(9) =473316a(10) =574716a(11) =813920a(12) =918080a(13) =1307022a(14) =2008360a(15) =3676242a(16) =9878244a(17) =10368512a(18) =12548754a(19) =19411480a(20) =22493262a(21) =42413484a(22) =77766486a(23) =81513816a(24) =157874000a(25) =240828972