A modified Legendre-binomial transform of 2^n for p=3.

Terms

a(0) =1a(1) =1a(2) =7a(3) =7a(4) =7a(5) =49a(6) =73a(7) =73a(8) =511a(9) =511a(10) =511a(11) =3577a(12) =3577a(13) =3577a(14) =25039a(15) =37303a(16) =37303a(17) =261121a(18) =262657a(19) =262657a(20) =1838599a(21) =1838599a(22) =1838599a(23) =12870193a(24) =19173961a(25) =19173961a(26) =134217727a(27) =134217727a(28) =134217727a(29) =939524089