Triangle read by rows: T(n,k) is the number of relations from an n-element set to a k-element set that are not one-to-one functions.

A344115

Triangle read by rows: T(n,k) is the number of relations from an n-element set to a k-element set that are not one-to-one functions.

Terms

    a(0) =1a(1) =2a(2) =14a(3) =5a(4) =58a(5) =506a(6) =12a(7) =244a(8) =4072a(9) =65512a(10) =27a(11) =1004a(12) =32708a(13) =1048456a(14) =33554312a(15) =58a(16) =4066a(17) =262024a(18) =16776856a(19) =1073741104a(20) =68719476016a(21) =121a(22) =16342a(23) =2096942a(24) =268434616a(25) =34359735848a(28) =248a(29) =65480a(30) =16776880a(31) =4294965616

External references