Number of permutations of [n] avoiding the generalized patterns 1(k+2)-(u_1+1)-...-(u_k+1) for all permutations u of [k].

A263791

Number of permutations of [n] avoiding the generalized patterns 1(k+2)-(u_1+1)-...-(u_k+1) for all permutations u of [k].

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =2a(8) =5a(9) =1a(10) =1a(11) =2a(12) =6a(13) =14a(14) =1a(15) =1a(16) =2a(17) =6a(18) =22a(19) =42a(20) =1a(21) =1a(22) =2a(23) =6a(24) =24a(25) =92a(26) =132a(27) =1a(28) =1a(29) =2

External references