Third trisection of A061037.

Terms

a(0) =3a(1) =45a(2) =6a(3) =165a(4) =63a(5) =357a(6) =30a(7) =621a(8) =195a(9) =957a(10) =72a(11) =1365a(12) =399a(13) =1845a(14) =132a(15) =2397a(16) =675a(17) =3021a(18) =210a(19) =3717a(20) =1023a(21) =4485a(22) =306a(23) =5325a(24) =1443a(25) =6237a(26) =420a(27) =7221a(28) =1935a(29) =8277