451166domain: NAppears in sequencesSum along upward diagonal of Pascal triangle to halfway point.at n=30A010754Sum along upward diagonal of Pascal triangle up to (but not including) halfway point.at n=30A010755Diagonal sums of triangle A099575.at n=28A099577a(n) = Sum_{k=0..n} binomial(3*n+k+2,n-k).at n=7A390238