Number of (n+1)X4 0..2 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards.
A205210
Number of (n+1)X4 0..2 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards.
Terms
- a(0) =1970a(1) =23578a(2) =357812a(3) =5500266a(4) =82656765a(5) =1236875696a(6) =18436719991a(7) =274894006610
External references
- oeis: A205210