Number of (n+1)X6 0..1 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards.

A204036

Number of (n+1)X6 0..1 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards.

Terms

    a(0) =676a(1) =5130a(2) =37642a(3) =189580a(4) =969528a(5) =3811097a(6) =15164049a(7) =50226272a(8) =167435933a(9) =488825091a(10) =1431119793a(11) =3794040002a(12) =10068045085a(13) =24759248822a(14) =60904889948a(15) =141191889755a(16) =327408688415a(17) =724682233233

External references