Triangle T(n,k) read by rows, giving number of matroids of rank k on n labeled points (n >= 0, 0 <= k <= n).
A058669
Triangle T(n,k) read by rows, giving number of matroids of rank k on n labeled points (n >= 0, 0 <= k <= n).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =1a(6) =1a(7) =7a(8) =7a(9) =1a(10) =1a(11) =15a(12) =36a(13) =15a(14) =1a(15) =1a(16) =31a(17) =171a(18) =171a(19) =31a(20) =1a(21) =1a(22) =63a(23) =813a(24) =2053a(25) =813a(26) =63a(27) =1a(28) =1a(29) =127
External references
- oeis: A058669