The trinomial transform (A027907) gives powers of 2, while the trinomial transform of this sequence shift one place left gives powers of 3.

A100321

The trinomial transform (A027907) gives powers of 2, while the trinomial transform of this sequence shift one place left gives powers of 3.

Terms

    a(0) =1a(1) =1a(2) =0a(3) =2a(4) =-3a(5) =8a(6) =-16a(7) =35a(8) =-72a(9) =150a(10) =-307a(11) =628a(12) =-1276a(13) =2587a(14) =-5228a(15) =10546a(16) =-21235a(17) =42704a(18) =-85784a(19) =172179a(20) =-345344a(21) =692286a(22) =-1387155a(23) =2778492a(24) =-5563748a(25) =11138443a(26) =-22294596a(27) =44617850a(28) =-89282067a(29) =178639160

External references