Number of (n+1) X (7+1) 0..3 arrays with every 2 X 2 subblock summing to 6 and no 2 X 2 subblock having exactly two nonzero entries.
A251235
Number of (n+1) X (7+1) 0..3 arrays with every 2 X 2 subblock summing to 6 and no 2 X 2 subblock having exactly two nonzero entries.
Terms
- a(0) =27714a(1) =42850a(2) =71322a(3) =129378a(4) =250622a(5) =514950a(6) =1112526a(7) =2511890a(8) =5892002a(9) =14279706a(10) =35575142a(11) =90692606a(12) =235679686a(13) =622362410a(14) =1666024058a(15) =4512772642a(16) =12352459294a(17) =34135460774a(18) =95175625390a(19) =267630015058a(20) =758790404898
External references
- oeis: A251235