47337

Appears in sequences

• Expansion of Product_{m >=1} (1+q^m)^31.at n=4A022595
• Numbers k such that 21*2^k+1 is prime.at n=31A032360
• Triangle, read by rows, that transforms diagonals in the array A158825 of coefficients of successive iterations of x*C(x) where C(x) is the Catalan function (A000108).at n=30A158835
• Column 2 of triangle A158835.at n=5A158838
• a(n) = 2 + Sum_{k=0..n-1} A176513(4*k+1).at n=9A176621
• n/3 analog of Keith numbers.at n=10A282767