Triangle T(n,k) of k-block tricoverings of an n-set (n >= 3, k >= 4).

Terms

a(0) =1a(1) =3a(2) =1a(3) =7a(4) =57a(5) =95a(6) =43a(7) =3a(8) =35a(9) =717a(10) =3107a(11) =4520a(12) =2465a(13) =445a(14) =12a(15) =155a(16) =7845a(17) =75835a(18) =244035a(19) =325890a(20) =195215a(21) =50825a(22) =4710a(23) =70a(24) =651a(25) =81333a(26) =1653771a(27) =10418070a(28) =27074575a(29) =33453959