Number of (n+1) X (2+1) arrays of permutations of 0..n*3+2 with each element having directed index change -1,-1 1,0 -1,-2 -2,-2 or 0,1.
A264670
Number of (n+1) X (2+1) arrays of permutations of 0..n*3+2 with each element having directed index change -1,-1 1,0 -1,-2 -2,-2 or 0,1.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =19a(4) =44a(5) =108a(6) =264a(7) =649a(8) =1573a(9) =3837a(10) =9353a(11) =22801a(12) =55571a(13) =135432a(14) =330113a(15) =804604a(16) =1961113a(17) =4779902a(18) =11650318a(19) =28396001a(20) =69211142a(21) =168692149a(22) =411162676a(23) =1002149647a(24) =2442594935a(25) =5953472042a(26) =14510727488a(27) =35367800720a(28) =86203902041
External references
- oeis: A264670