T(n,k) = Number of n X k 0..2 arrays with successive rows and columns fitting to straight lines with nondecreasing slope, with a single point array taken as having zero slope.

A222996

T(n,k) = Number of n X k 0..2 arrays with successive rows and columns fitting to straight lines with nondecreasing slope, with a single point array taken as having zero slope.

Terms

    a(0) =3a(1) =9a(2) =9a(3) =27a(4) =50a(5) =27a(6) =81a(7) =222a(8) =222a(9) =81a(10) =243a(11) =867a(12) =3510a(13) =867a(14) =243a(15) =729a(16) =3123a(17) =35845a(18) =35845a(19) =3123a(20) =729a(21) =2187a(22) =10660a(23) =440451a(24) =703848a(25) =440451a(26) =10660a(27) =2187a(28) =6561a(29) =35064

External references