Triangle read by rows: T(n,k) is the number of permutations of {1,...,n} whose longest embedded arithmetic progression has length k.

A339941

Triangle read by rows: T(n,k) is the number of permutations of {1,...,n} whose longest embedded arithmetic progression has length k.

Terms

    a(0) =1a(1) =0a(2) =2a(3) =0a(4) =4a(5) =2a(6) =0a(7) =10a(8) =12a(9) =2a(10) =0a(11) =20a(12) =82a(13) =16a(14) =2a(15) =0a(16) =48a(17) =516a(18) =134a(19) =20a(20) =2a(21) =0a(22) =104a(23) =3232a(24) =1480a(25) =198a(26) =24a(27) =2a(28) =0a(29) =282

External references