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In analogue to Pascal triangle ( a + b) , i consider the triangles

1) a^2 + b^2
2) (a^2 + a + b^2 + b)/2

And in particular the analogue central binomial coëfficiënts.


Obviosly everything grows like C 2^2^(n+O(1)) nomatter in what direction you go.
More precise results for specific cases are possible and intresting.
And the number theoretical properties.