Numbers k such that A007947(k) = A007947(m+1) and A007947(m) = A007947(k+1), where k > m.

A088966

Numbers k such that A007947(k) = A007947(m+1) and A007947(m) = A007947(k+1), where k > m.

Terms

    a(0) =3a(1) =8a(2) =24a(3) =80a(4) =288a(5) =1088a(6) =4224a(7) =4374a(8) =16640a(9) =66048a(10) =263168a(11) =1050624a(12) =4198400a(13) =16785408a(14) =67125248a(15) =268468224a(16) =1073807360a(17) =4295098368a(18) =17180131328a(19) =68720001024a(20) =274878955520

External references