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

A334772

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

Terms

    a(0) =2a(1) =12a(2) =66a(3) =36a(4) =576a(5) =1168a(6) =80a(7) =2610a(8) =17376a(9) =16220a(10) =150a(11) =8520a(12) =129800a(13) =448800a(14) =202416a(15) =252a(16) =22680a(17) =659560a(18) =5748750a(19) =10861056a(20) =2395540a(21) =392a(22) =52416a(23) =2596608a(24) =46412200a(25) =241987500a(26) =253940736a(27) =27517568a(28) =576a(29) =109116

External references