Number of nX4 0..1 arrays with every element equal to 0, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

A298440

Number of nX4 0..1 arrays with every element equal to 0, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =2a(2) =2a(3) =7a(4) =34a(5) =105a(6) =406a(7) =1504a(8) =6183a(9) =25013a(10) =101678a(11) =415769a(12) =1698260a(13) =6946900a(14) =28410788a(15) =116224736a(16) =475473836a(17) =1945191906a(18) =7958073544a(19) =32557752952a(20) =133199605252a(21) =544944086735

External references