Composite connected numbers: composite numbers k such that g(k) < g(u) + g(v) holds for all relatively prime factorizations k=u*v, where g(x) = ceiling(log_2 x).
A029827
Composite connected numbers: composite numbers k such that g(k) < g(u) + g(v) holds for all relatively prime factorizations k=u*v, where g(x) = ceiling(log_2 x).
Terms
- a(0) =15a(1) =45a(2) =51a(3) =55a(4) =57a(5) =63a(6) =85a(7) =95a(8) =99a(9) =111a(10) =115a(11) =117a(12) =119a(13) =123a(14) =153a(15) =171a(16) =185a(17) =187a(18) =201a(19) =205a(20) =207a(21) =209a(22) =213a(23) =215a(24) =219a(25) =221a(26) =225a(27) =231a(28) =235a(29) =237
External references
- oeis: A029827