Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum not 2 4 5 or 7 and every diagonal and antidiagonal sum 2 4 5 or 7.
A251872
Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum not 2 4 5 or 7 and every diagonal and antidiagonal sum 2 4 5 or 7.
Terms
- a(0) =5756a(1) =15116a(2) =9936a(3) =13152a(4) =31520a(5) =46464a(6) =62720a(7) =164480a(8) =252736a(9) =389376a(10) =910400a(11) =1559552a(12) =2443264a(13) =5882368a(14) =10571776a(15) =17743872a(16) =40570880a(17) =77176832a(18) =131203072a(19) =302153728a(20) =586940416a(21) =1020788736a(22) =2313420800a(23) =4577165312a(24) =7994343424
External references
- oeis: A251872