Number of partitions of 3n into powers of 3.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =7a(5) =9a(6) =12a(7) =15a(8) =18a(9) =23a(10) =28a(11) =33a(12) =40a(13) =47a(14) =54a(15) =63a(16) =72a(17) =81a(18) =93a(19) =105a(20) =117a(21) =132a(22) =147a(23) =162a(24) =180a(25) =198a(26) =216a(27) =239a(28) =262a(29) =285