Number of (n+1)X(1+1) 0..3 arrays with the sum of all four elements of every 2X2 subblock equal.
A237008
Number of (n+1)X(1+1) 0..3 arrays with the sum of all four elements of every 2X2 subblock equal.
Terms
- a(0) =256a(1) =704a(2) =1936a(3) =5984a(4) =18496a(5) =61472a(6) =204304a(7) =712352a(8) =2483776a(9) =8957984a(10) =32307856a(11) =119454944a(12) =441672256a(13) =1663878752a(14) =6268205584a(15) =23952380192a(16) =91528031296a(17) =353581084064
External references
- oeis: A237008