Number of nX4 (0,1,2) arrays of permanents of 2X2 subblocks of some (n+1)X5 binary array with rows and columns of the latter in lexicographically nondecreasing order.
A227023
Number of nX4 (0,1,2) arrays of permanents of 2X2 subblocks of some (n+1)X5 binary array with rows and columns of the latter in lexicographically nondecreasing order.
Terms
- a(0) =18a(1) =171a(2) =1366a(3) =10050a(4) =65317a(5) =375270a(6) =1924848a(7) =8908719a(8) =37616613a(9) =146387460a(10) =529743352a(11) =1796459014a(12) =5746888515a(13) =17440783714a(14) =50456503591a(15) =139731086307a(16) =371756133099a(17) =953183208702
External references
- oeis: A227023