45221

Appears in sequences

• Strong pseudoprimes to base 41.at n=20A020267
• Composite numbers whose prime factors contain no digits other than 1 and 4.at n=7A036304
• Numerators of continued fraction convergents to sqrt(377).at n=6A041714
• Integer part of Gauss's Arithmetic-Geometric Mean M(2,n^4).at n=24A127765
• Coefficient of x^2 in minimal polynomial of the continued fraction [1^n,2/3,1,1,1,...], where 1^n means n ones.at n=11A266703
• a(n) = Sum_{k=1..n} binomial(floor(n/k)+3,4).at n=29A365409