Triangle read by rows: T(m,n) = number of weak factorization systems (trivial Quillen model structures) on the product category [m]x[n], where [m] denotes the total order on m objects, viewed as a category.

A092450

Triangle read by rows: T(m,n) = number of weak factorization systems (trivial Quillen model structures) on the product category [m]x[n], where [m] denotes the total order on m objects, viewed as a category.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =2a(8) =2a(9) =1a(10) =1a(11) =5a(12) =10a(13) =5a(14) =1a(15) =1a(16) =14a(17) =68a(18) =68a(19) =14a(20) =1a(21) =1a(22) =42a(23) =544a(24) =1396a(25) =544a(26) =42a(27) =1a(28) =1a(29) =132

External references