Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having directed index change 0,1 0,-2 1,0 or -1,0.

A264302

Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having directed index change 0,1 0,-2 1,0 or -1,0.

Terms

    a(0) =1a(1) =20a(2) =89a(3) =332a(4) =1952a(5) =10449a(6) =51825a(7) =271385a(8) =1423312a(9) =7377473a(10) =38384768a(11) =199921136a(12) =1040944841a(13) =5418020729a(14) =28200226049a(15) =146829523292a(16) =764363230209

External references