Numbers k such that A030747(k) = 2.

Terms

a(0) =4a(1) =9a(2) =10a(3) =22a(4) =73a(5) =76a(6) =93a(7) =110a(8) =112a(9) =132a(10) =154a(11) =175a(12) =176a(13) =180a(14) =199a(15) =209a(16) =236a(17) =240a(18) =273a(19) =304a(20) =305a(21) =309a(22) =347a(23) =382a(24) =387a(25) =421a(26) =425a(27) =428a(28) =431a(29) =470