Numbers m for which sigma(m) - m = tau(m)^k for some integer k > 0.

A219668

Numbers m for which sigma(m) - m = tau(m)^k for some integer k > 0.

Terms

    a(0) =4a(1) =26a(2) =56a(3) =90a(4) =122a(5) =568a(6) =2042a(7) =8186a(8) =32762a(9) =37432a(10) =68652a(11) =299576a(12) =2097146a(13) =8388602a(14) =19173944a(15) =33554426a(16) =67751984a(17) =78536544824a(18) =306296525088

External references