Triangle related to the partitions of n in three colors, read by rows.

Terms

a(0) =9a(1) =6a(2) =243a(3) =1a(4) =243a(5) =6561a(6) =0a(7) =90a(8) =8748a(9) =177147a(10) =0a(11) =15a(12) =4860a(13) =295245a(14) =4782969a(15) =0a(16) =1a(17) =1458a(18) =216513a(19) =9565938a(20) =129140163a(21) =0a(22) =0a(23) =252a(24) =91854a(25) =8680203a(26) =301327047a(27) =3486784401a(28) =0a(29) =0