Number of (n+2)X7 binary matrices with every 3X3 block having exactly four 1's.

A181259

Number of (n+2)X7 binary matrices with every 3X3 block having exactly four 1's.

Terms

    a(0) =7218a(1) =10348a(2) =14974a(3) =22512a(4) =41374a(5) =79324a(6) =162882a(7) =387076a(8) =952462a(9) =2438184a(10) =6643798a(11) =18382036a(12) =51676218a(13) =148824748a(14) =431409094a(15) =1258929552a(16) =3710111854a(17) =10965458044a(18) =32503791762a(19) =96750343636a(20) =288356652382a(21) =860533686264

External references