Number of length n arrays of permutations of 0..n-1 with each element moved by -3 to 3 places and exactly one more element moved upwards than downwards.

A263759

Number of length n arrays of permutations of 0..n-1 with each element moved by -3 to 3 places and exactly one more element moved upwards than downwards.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =4a(4) =19a(5) =50a(6) =165a(7) =476a(8) =1543a(9) =4544a(10) =14108a(11) =41666a(12) =127313a(13) =379674a(14) =1152233a(15) =3448844a(16) =10424890a(17) =31290646a(18) =94453041a(19) =284071264a(20) =857114281a(21) =2581411140a(22) =7789677889a(23) =23486717204a(24) =70901078303a(25) =213968862304a(26) =646246694302

External references