Irregular triangle read by rows: T(n,k) is the number of k-crossing partitions on 2n nodes, where all partition terms alternate in parity, counted up to reflection.
A368054
Irregular triangle read by rows: T(n,k) is the number of k-crossing partitions on 2n nodes, where all partition terms alternate in parity, counted up to reflection.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =0a(4) =1a(5) =14a(6) =0a(7) =8a(8) =10a(9) =2a(10) =2a(11) =81a(12) =0a(13) =59a(14) =162a(15) =70a(16) =66a(17) =82a(18) =22a(19) =19a(20) =6a(21) =7a(22) =0a(23) =2a(24) =538a(25) =0a(26) =454a(27) =1952a(28) =1229a(29) =1208
External references
- oeis: A368054