Numbers k >= 2 such that (S(k) - I(k)) / (k - 1) is an integer, where S(k) = Sum_{i=2..k} A007918(i) and I(k) = Sum_{i=2..k} A007917(i).

A383358

Numbers k >= 2 such that (S(k) - I(k)) / (k - 1) is an integer, where S(k) = Sum_{i=2..k} A007918(i) and I(k) = Sum_{i=2..k} A007917(i).

Terms

    a(0) =2a(1) =3a(2) =16a(3) =21a(4) =23a(5) =39a(6) =49a(7) =381a(8) =396a(9) =24963a(10) =39762a(11) =40101a(12) =40276a(13) =4431583a(14) =21553054a(15) =36244531a(16) =2183957515a(17) =2183971285a(18) =2183971945a(19) =3636636400a(20) =3636636411a(21) =6063744535a(22) =16846463635a(23) =28070695902a(24) =215867952637a(25) =359222008925a(26) =597739400517a(27) =597739400913a(28) =597739426757

External references