Number of (n+2)X(2+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 1 and no column sum 1.

A255095

Number of (n+2)X(2+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 1 and no column sum 1.

Terms

    a(0) =77a(1) =189a(2) =539a(3) =1475a(4) =4075a(5) =11573a(6) =32627a(7) =91821a(8) =259851a(9) =734851a(10) =2075941a(11) =5870163a(12) =16600435a(13) =46931203a(14) =132697609a(15) =375223671a(16) =1060938473a(17) =2999820909a(18) =8482201517a(19) =23983752731a(20) =67814920687a(21) =191749978139a(22) =542181596411

External references