Number of (n+1) X (1+1) arrays of permutations of 0..n*2+1 with each element having directed index change 0,0 0,1 1,0 -2,-1 or -1,-2.
A264166
Number of (n+1) X (1+1) arrays of permutations of 0..n*2+1 with each element having directed index change 0,0 0,1 1,0 -2,-1 or -1,-2.
Terms
- a(0) =1a(1) =4a(2) =8a(3) =16a(4) =33a(5) =69a(6) =145a(7) =300a(8) =624a(9) =1300a(10) =2705a(11) =5629a(12) =11713a(13) =24376a(14) =50728a(15) =105564a(16) =219681a(17) =457161a(18) =951361a(19) =1979800a(20) =4120000a(21) =8573800a(22) =17842241a(23) =37130041a(24) =77268321a(25) =160796844a(26) =334621288a(27) =696353256a(28) =1449124353a(29) =3015655309
External references
- oeis: A264166