Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 10101-11111 pattern in any orientation.

A147424

Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 10101-11111 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =5a(7) =13a(8) =31a(9) =123a(10) =397a(11) =1299a(12) =7415a(13) =48549a(14) =328016a(15) =2805259a(16) =26286523a(17) =261135019a(18) =3222276941a(19) =47592701035a(20) =811402107260

External references