Number of non-isomorphic set-systems with 4 sets each with n elements.
A331715
Number of non-isomorphic set-systems with 4 sets each with n elements.
Terms
- a(0) =1a(1) =11a(2) =66a(3) =278a(4) =966a(5) =2957a(6) =8149a(7) =20676a(8) =48911a(9) =108942a(10) =230201a(11) =464528a(12) =899633a(13) =1679685a(14) =3034620
External references
- oeis: A331715