Number of (n+2) X (5+2) 0..3 arrays with every 3 X 3 subblock row and column sum unequal to 4 or 5 and every diagonal and antidiagonal sum equal to 4 or 5.
A251902
Number of (n+2) X (5+2) 0..3 arrays with every 3 X 3 subblock row and column sum unequal to 4 or 5 and every diagonal and antidiagonal sum equal to 4 or 5.
Terms
- a(0) =9208a(1) =3910a(2) =6408a(3) =10266a(4) =30504a(5) =61686a(6) =101508a(7) =274648a(8) =604412a(9) =1157444a(10) =2963592a(11) =6561772a(12) =13973448a(13) =33703928a(14) =77705104a(15) =169380356a(16) =413827088a(17) =941228756a(18) =2169495936a(19) =5059526272a(20) =11958199184a(21) =27132425020a(22) =65066225412a(23) =149294564036
External references
- oeis: A251902