Numbers k such that s(k) + s(k+1) + s(k+2) = t(k) + t(k+1) + t(k+2) where s(k) = sigma(k) - k, t(k) = |s(k) - k|.

A033910

Numbers k such that s(k) + s(k+1) + s(k+2) = t(k) + t(k+1) + t(k+2) where s(k) = sigma(k) - k, t(k) = |s(k) - k|.

Terms

    a(0) =7a(1) =27a(2) =383a(3) =1767a(4) =2059a(5) =2239a(6) =6591a(7) =24079a(8) =46591a(9) =62847a(10) =95767a(11) =496083a(12) =10397407a(13) =14348907a(14) =32822543a(15) =183668391a(16) =525969735a(17) =1495596183a(18) =2819404431a(19) =5452084351a(20) =6141845439a(21) =7949695103a(22) =18352366175a(23) =20538294335

External references