Number of nX4 binary arrays whose sum with another nX4 binary array containing no more than a single 1 has rows and columns in lexicographically nondecreasing order.
A225896
Number of nX4 binary arrays whose sum with another nX4 binary array containing no more than a single 1 has rows and columns in lexicographically nondecreasing order.
Terms
- a(0) =11a(1) =78a(2) =545a(3) =3459a(4) =19270a(5) =93428a(6) =396804a(7) =1495926a(8) =5079770a(9) =15751596a(10) =45136888a(11) =120738965a(12) =304047638a(13) =725911911a(14) =1652919000a(15) =3607621216a(16) =7579528833a(17) =15385065750a(18) =30266189863a(19) =57863160815a(20) =107762341802a(21) =195911924170
External references
- oeis: A225896