Number of (3+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 2 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 2 3 4 6 or 7.
A252410
Number of (3+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 2 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 2 3 4 6 or 7.
Terms
- a(0) =319a(1) =688a(2) =1515a(3) =2555a(4) =7425a(5) =18377a(6) =32710a(7) =97923a(8) =245711a(9) =440341a(10) =1327285a(11) =3343809a(12) =6005069a(13) =18174197a(14) =45900357a(15) =82546379a(16) =250597823a(17) =634117095a(18) =1141608889a(19) =3474085061a(20) =8803935237a(21) =15862997397a(22) =48363153977a(23) =122700674105a(24) =221224063343
External references
- oeis: A252410