44225

Appears in sequences

• Sum of all numbers from and including Fibonacci(n-1) to and including Fibonacci(n).at n=13A161762
• Triangle read by rows: T(n,k) = round(c(n)/(c(k)*c(n-k))) where c are partial products of a sequence defined in comments.at n=48A172359
• Triangle read by rows: T(n,k) = round(c(n)/(c(k)*c(n-k))) where c are partial products of a sequence defined in comments.at n=51A172359
• Expansion of e.g.f. Product_{k>=1} sec(x^k) (even powers only).at n=4A330516
• Numbers k such that one can make an equilateral triangle from a chain of linked rods of length 1, 2, 3, ..., k, with perimeter equal to the total length.at n=37A382632