Number of (1+1) X (n+1) arrays of permutations of 0..n*2+1 with each element having directed index change -1,1 0,-1 0,1 or 1,0.

A264507

Number of (1+1) X (n+1) arrays of permutations of 0..n*2+1 with each element having directed index change -1,1 0,-1 0,1 or 1,0.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =6a(4) =12a(5) =24a(6) =46a(7) =91a(8) =177a(9) =349a(10) =684a(11) =1345a(12) =2640a(13) =5185a(14) =10180a(15) =19989a(16) =39249a(17) =77067a(18) =151326a(19) =297136a(20) =583444a(21) =1145622a(22) =2249491a(23) =4416993a(24) =8673001a(25) =17029896a(26) =33439105a(27) =65659456a(28) =128925825a(29) =253152696

External references