Number of (n+2) X 3 0..1 matrices with each 3 X 3 subblock having the same population.
A224644
Number of (n+2) X 3 0..1 matrices with each 3 X 3 subblock having the same population.
Terms
- a(0) =512a(1) =1280a(2) =3200a(3) =8000a(4) =22400a(5) =62720a(6) =175616a(7) =514304a(8) =1506176a(9) =4410944a(10) =13125248a(11) =39055616a(12) =116214272a(13) =347690240a(14) =1040220800a(15) =3112136000a(16) =9327881600a(17) =27958088960a(18) =83797669376a(19) =251316410624a(20) =753719509376
External references
- oeis: A224644