1921194

Appears in sequences

• n-th diagonal sum of right justified array T given by A027960.at n=29A027976
• a(n) = 2*a(n-1) - a(n-2) + a(n-4) for n>3, a(0)=2, a(1)=3, a(2)=5, a(3)=7, a sequence related to Lucas numbers.at n=29A291660