Numbers k such that A030747(k)=4.

Terms

a(0) =1a(1) =11a(2) =28a(3) =38a(4) =60a(5) =88a(6) =91a(7) =107a(8) =109a(9) =131a(10) =153a(11) =206a(12) =267a(13) =302a(14) =379a(15) =429a(16) =477a(17) =518a(18) =522a(19) =527a(20) =570a(21) =572a(22) =580a(23) =633a(24) =637a(25) =692a(26) =747a(27) =755a(28) =760a(29) =826