Card-matching numbers (Dinner-Diner matching numbers).

Terms

a(0) =1a(1) =2a(2) =3a(3) =0a(4) =1a(5) =10a(6) =24a(7) =27a(8) =16a(9) =12a(10) =0a(11) =1a(12) =56a(13) =216a(14) =378a(15) =435a(16) =324a(17) =189a(18) =54a(19) =27a(20) =0a(21) =1a(22) =346a(23) =1824a(24) =4536a(25) =7136a(26) =7947a(27) =6336a(28) =3936a(29) =1728