Number of (n+2) X (6+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 2 3 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 2 3 6 or 7.
A252530
Number of (n+2) X (6+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 2 3 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 2 3 6 or 7.
Terms
- a(0) =932a(1) =1000a(2) =1760a(3) =2440a(4) =7184a(5) =13184a(6) =18656a(7) =54464a(8) =101888a(9) =145792a(10) =423680a(11) =800768a(12) =1152512a(13) =3341312a(14) =6348800a(15) =9164800a(16) =26537984a(17) =50561024a(18) =73097216a(19) =211533824a(20) =403570688a(21) =583892992a(22) =1689190400a(23) =3224895488a(24) =4667604992a(25) =13501202432
External references
- oeis: A252530