1/8 the number of (n+1)X7 0..3 arrays with all 2X2 subblock sums the same.
A184026
1/8 the number of (n+1)X7 0..3 arrays with all 2X2 subblock sums the same.
Terms
- a(0) =7684a(1) =11541a(2) =18701a(3) =35256a(4) =70867a(5) =159318a(6) =374381a(7) =950430a(8) =2493379a(9) =6918426a(10) =19700261a(11) =58562166a(12) =177935707a(13) =560102058a(14) =1799006381a(15) =5959407990a(16) =20122577299a(17) =69815060586a(18) =246423783221a(19) =889827288726
External references
- oeis: A184026