47300

Appears in sequences

• Fibonacci sequence beginning 1, 29.at n=17A022399
• The value of the associated Legendre Polynomial of index n and order 1 evaluated at x=2^(-1/2) multiplied by 2^(3*n/2-1).at n=10A025163
• Number of regions in regular n-gon which are quadrilaterals (4-gons) when all its diagonals are drawn.at n=40A067151
• In chess, the number of checkmate dual-free proof games in n plies.at n=9A126685
• Numbers k such that 8k+1, 12k+1 and 24k+1 are primes and the last two are also of the form x^2 + 27y^2, so the tetrahedral number T(24k+1) is a Fermat pseudoprime to base 2.at n=33A321867
• a(n) = Sum_{1 <= i <= j <= k <= m <= n} gcd(i,j,k,m).at n=29A344992
• Triangle read by row. The reduced triangle of the partition_triangle A355776.at n=47A356116
• Triangle read by row. The reduced triangle of the partition_triangle A355776.at n=52A356116