Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum not 2 3 6 or 7 and every diagonal and antidiagonal sum 2 3 6 or 7.
A251887
Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum not 2 3 6 or 7 and every diagonal and antidiagonal sum 2 3 6 or 7.
Terms
- a(0) =1280a(1) =1664a(2) =1280a(3) =1280a(4) =1534a(5) =1752a(6) =2146a(7) =2838a(8) =3446a(9) =4406a(10) =5830a(11) =7266a(12) =9446a(13) =12606a(14) =15958a(15) =20914a(16) =27986a(17) =35746a(18) =47062a(19) =62958a(20) =80926a(21) =106810a(22) =142678a(23) =184318a(24) =243594a(25) =324870a(26) =421406a(27) =557302a(28) =742186a(29) =966026
External references
- oeis: A251887