1950697

Appears in sequences

• Sum along upward diagonal of Pascal triangle to center.at n=31A010752
• Sum along upward diagonal of Pascal triangle up to (but not including) center.at n=31A010753
• a(n) = T(n,0) + T(n,1) + ... + T(n,[ n/2 ]), T given by A026670.at n=20A026678
• a(n) = Sum_{j=0..n} T(n,j), T given by A026736.at n=20A026743
• a(n) = T(n,m) + T(n,m+1) + ... + T(n,n), where m=[ (n+1)/2 ], T given by A026725.at n=21A026847
• T(n,n-5), array T as in A038738.at n=10A038742
• a(n) = Sum_{k=0..n} binomial(2*n+k+1,n-k).at n=10A390266