138825

Appears in sequences

• a(n) = Sum_{k=m..n} T(k,n-k), where m = floor((n+1)/2); a(n) is the n-th diagonal-sum of left justified array T given by A027935.at n=30A027947
• Figurate numbers based on the 24-cell (4-D polytope with Schlaefli symbol {3,4,3}).at n=15A092181
• a(0) = ... = a(3) = 1; a(n) = a(n-4) + Sum_{k=0..n-5} a(k) * a(n-k-5).at n=32A343305