Square roots of the odd indexed terms of A038547.

Terms

a(0) =1a(1) =3a(2) =9a(3) =27a(4) =15a(5) =243a(6) =729a(7) =45a(8) =6561a(9) =19683a(10) =135a(11) =177147a(12) =225a(13) =105a(14) =4782969a(15) =14348907a(16) =1215a(17) =675a(18) =387420489a(19) =3645a(20) =3486784401a(21) =10460353203a(22) =315a(23) =94143178827a(24) =3375a(25) =32805a(27) =6075a(28) =98415