Array read by antidiagonals: T(n,k) is the number of permutations of k indistinguishable copies of 1..n with exactly 2 local maxima.

A334773

Array read by antidiagonals: T(n,k) is the number of permutations of k indistinguishable copies of 1..n with exactly 2 local maxima.

Terms

    a(0) =3a(1) =12a(2) =57a(3) =30a(4) =360a(5) =705a(6) =60a(7) =1400a(8) =7968a(9) =7617a(10) =105a(11) =4170a(12) =51750a(13) =163584a(14) =78357a(15) =168a(16) =10437a(17) =241080a(18) =1830000a(19) =3293184a(20) =791589a(21) =252a(22) =23072a(23) =894201a(24) =13562040a(25) =64168750a(26) =65968128a(27) =7944321a(28) =360a(29) =46440

External references