Number of nX4 binary arrays whose sum with another nX4 binary array containing no more than two 1s has rows and columns in lexicographically nondecreasing order.
A225978
Number of nX4 binary arrays whose sum with another nX4 binary array containing no more than two 1s has rows and columns in lexicographically nondecreasing order.
Terms
- a(0) =15a(1) =138a(2) =1178a(3) =9113a(4) =61808a(5) =361361a(6) =1825607a(7) =8065278a(8) =31631401a(9) =111785599a(10) =360788468a(11) =1075829429a(12) =2993017696a(13) =7832960008a(14) =19417916324a(15) =45865067963a(16) =103734768130a(17) =225619306783a(18) =473616394498a(19) =962612525277
External references
- oeis: A225978