37442161

Appears in sequences

• Euler characteristics of polytopes.at n=28A006481
• a(n) = (Lucas(6*n) - 2)/16.at n=7A049683
• Squares of the form 5n*(n-1)+1.at n=3A062788
• Alternating row sums of A257241, Stifel's version of the arithmetical triangle.at n=28A258144
• a(n) = binomial(2*n, n+1) + 1.at n=14A323229