Number of nX4 0..2 white square subarrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value 2-x(i,j).
A230648
Number of nX4 0..2 white square subarrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value 2-x(i,j).
Terms
- a(0) =0a(1) =9a(2) =21a(3) =123a(4) =531a(5) =2547a(6) =11745a(7) =54957a(8) =255753a(9) =1192623a(10) =5557191a(11) =25901847a(12) =120714693a(13) =562609041a(14) =2622085629a(15) =12220512675a(16) =56954899323a(17) =265444104699
External references
- oeis: A230648