Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 01110-11111 pattern in any orientation.

A147366

Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 01110-11111 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =4a(7) =7a(8) =18a(9) =27a(10) =60a(11) =127a(12) =520a(13) =1313a(14) =5577a(15) =14738a(16) =65753a(17) =214371a(18) =1292619a(19) =5259696a(20) =36901354a(21) =169889413a(22) =1338225681a(23) =7299428688

External references