a(n) = binomial(n+10, 10)*3^n.

Terms

a(0) =1a(1) =33a(2) =594a(3) =7722a(4) =81081a(5) =729729a(6) =5837832a(7) =42532776a(8) =287096238a(9) =1818276174a(10) =10909657044a(11) =62482581252a(12) =343654196886