Triangle read by rows: T(n,k) = number of crossing connected diagrams in a disk having n crossings and k chords.

A232227

Triangle read by rows: T(n,k) = number of crossing connected diagrams in a disk having n crossings and k chords.

Terms

    a(0) =1a(1) =0a(2) =8a(3) =0a(4) =1a(5) =82a(6) =0a(7) =0a(8) =43a(9) =868a(10) =0a(11) =0a(12) =11a(13) =920a(14) =9726a(15) =0a(16) =0a(17) =1a(18) =590a(19) =15524a(20) =113536a(21) =0a(22) =0a(23) =0a(24) =243a(25) =15904a(26) =243040a(27) =1366570

External references