Number of (n+2) X (2+2) 0..3 arrays with every 3 X 3 subblock row and column sum not equal to 0 3 5 6 or 7 and every 3 X 3 diagonal and antidiagonal sum equal to 0 3 5 6 or 7.
A252248
Number of (n+2) X (2+2) 0..3 arrays with every 3 X 3 subblock row and column sum not equal to 0 3 5 6 or 7 and every 3 X 3 diagonal and antidiagonal sum equal to 0 3 5 6 or 7.
Terms
- a(0) =260a(1) =239a(2) =242a(3) =268a(4) =302a(5) =359a(6) =437a(7) =549a(8) =707a(9) =919a(10) =1239a(11) =1682a(12) =2274a(13) =3182a(14) =4435a(15) =6115a(16) =8699a(17) =12273a(18) =17095a(19) =24497a(20) =34778a(21) =48750a(22) =70120a(23) =99945a(24) =140781a(25) =202983a(26) =290223a(27) =410547a(28) =593069a(29) =850292
External references
- oeis: A252248