Total number of even lists in all sets of lists, cf. A000262.
A102290
Total number of even lists in all sets of lists, cf. A000262.
Terms
- a(0) =0a(1) =0a(2) =2a(3) =6a(4) =60a(5) =380a(6) =3990a(7) =37002a(8) =450296a(9) =5373720a(10) =76018410a(11) =1096730030a(12) =17814654132a(13) =299645294676
External references
- oeis: A102290