Number of (n+1) X (1+1) arrays of permutations of 0..n*2+1 with each element having directed index change 0,1 0,-1 0,2 1,0 -1,0 or 2,0.
A264158
Number of (n+1) X (1+1) arrays of permutations of 0..n*2+1 with each element having directed index change 0,1 0,-1 0,2 1,0 -1,0 or 2,0.
Terms
- a(0) =4a(1) =10a(2) =29a(3) =89a(4) =260a(5) =772a(6) =2281a(7) =6741a(8) =19940a(9) =58954a(10) =174329a(11) =515481a(12) =1524232a(13) =4507072a(14) =13327105a(15) =39407393a(16) =116525124a(17) =344557218a(18) =1018833429a(19) =3012624481a(20) =8908135596a(21) =26340780436a(22) =77887982793a(23) =230309723973a(24) =681010947204
External references
- oeis: A264158