a(n) = A051717(3n) + A051717(3n+1) + A051717(3n+2).

Terms

a(0) =6a(1) =66a(2) =114a(3) =162a(4) =5466a(5) =1026a(6) =1926a(7) =606a(8) =5466a(9) =1746a(10) =29154a(11) =522a(12) =3838386a(13) =27066a(14) =4302a(15) =1254a(16) =92886a(17) =3246a(18) =2466a(19) =1578a(20) =113573466a(21) =1026a(22) =129474a(23) =9402a(24) =280201746a(25) =66a(26) =236646a(27) =231006a(28) =6808626a(29) =122826