Number of (n+1) X (5+1) 0..2 arrays with every 2 X 2 subblock summing to 4 and no 2 X 2 subblock having exactly two nonzero entries.

A251146

Number of (n+1) X (5+1) 0..2 arrays with every 2 X 2 subblock summing to 4 and no 2 X 2 subblock having exactly two nonzero entries.

Terms

    a(0) =213a(1) =299a(2) =433a(3) =667a(4) =1061a(5) =1743a(6) =2925a(7) =5003a(8) =8689a(9) =15307a(10) =27317a(11) =49359a(12) =90237a(13) =166811a(14) =311569a(15) =587515a(16) =1117445a(17) =2141775a(18) =4132941a(19) =8022251a(20) =15650353a(21) =30663019a(22) =60294293a(23) =118919247a(24) =235137501a(25) =465904763a(26) =924738385a(27) =1838035483a(28) =3657558629

External references