Let Oc(n) = A005900(n) = n-th octahedral number. Consider all integer triples (i,j,k), j >= k > 0, with Oc(i) = Oc(j)+Oc(k), ordered by increasing i; sequence gives j values.

A053677

Let Oc(n) = A005900(n) = n-th octahedral number. Consider all integer triples (i,j,k), j >= k > 0, with Oc(i) = Oc(j)+Oc(k), ordered by increasing i; sequence gives j values.

Terms

    a(0) =6a(1) =40a(2) =454a(3) =2600a(4) =2586a(5) =20175a(6) =48103a(7) =93097a(8) =105805a(9) =265195a(10) =755100a(11) =803007a(12) =1211000a(13) =1111974a(14) =1493421a(15) =1499160a(16) =2622000a(17) =4309280a(18) =5127195a(19) =5574139

External references