Number of (n+2)X5 binary matrices with every 3X3 block having exactly four 1's.

A181257

Number of (n+2)X5 binary matrices with every 3X3 block having exactly four 1's.

Terms

    a(0) =906a(1) =1684a(2) =3190a(3) =6360a(4) =14974a(5) =36244a(6) =91122a(7) =247372a(8) =681262a(9) =1906656a(10) =5492470a(11) =15919324a(12) =46439466a(13) =136964884a(14) =405022630a(15) =1200958440a(16) =3576601774a(17) =10663915684a(18) =31832655522a(19) =95194295452a(20) =284820551902a(21) =852619865136

External references