Irregular triangle read by rows: T(n,k) is the number of endofunctions on [n] whose second-largest component has size exactly k; n >= 0, 0 <= k <= floor(n/2).

A350078

Irregular triangle read by rows: T(n,k) is the number of endofunctions on [n] whose second-largest component has size exactly k; n >= 0, 0 <= k <= floor(n/2).

Terms

    a(0) =1a(1) =1a(2) =3a(3) =1a(4) =17a(5) =10a(6) =142a(7) =87a(8) =27a(9) =1569a(10) =911a(11) =645a(12) =21576a(13) =11930a(14) =10260a(15) =2890a(16) =355081a(17) =189610a(18) =174132a(19) =104720a(20) =6805296a(21) =3543617a(22) =3229275a(23) =2493288a(24) =705740a(25) =148869153a(26) =76060087a(27) =67843521a(28) =60223520a(29) =34424208

External references