54925

Appears in sequences

• Numbers n such that n | 11^n + 10^n + 9^n + 8^n + 7^n + 6^n + 5^n + 4^n + 3^n + 2^n.at n=29A057288
• Numbers n that are the hypotenuse of exactly 17 distinct integer-sided right triangles, i.e., n^2 can be written as a sum of two squares in 17 ways.at n=3A097239
• Numbers of the form (5^i)*(13^j).at n=20A107466
• Numbers that factorize into a prime number of factors all raised to different prime exponents and no number appears both as an exponent and as a prime factor.at n=16A114131
• a(0)=1, a(1)=1, a(n) = 13*a(n/2) for n=2,4,6,..., a(n) = 12*a((n-1)/2) + a((n+1)/2) for n=3,5,7,....at n=24A116524
• a(0)=0, a(1)=0; for n>1, a(n) = a(n-1) + (n+1)*a(n-2) + 1.at n=11A185309
• Number of 0..n arrays x(0..3) of 4 elements with each no smaller than the sum of its previous elements modulo (n+1).at n=23A200253
• Number of (w,x,y,z) with all terms in {0,...,n} and w, x, and y even.at n=24A212759
• a(n) = n*(n+1)*(7*n-6)/2.at n=25A256718
• Powerful numbers whose prime factors are all of the form 4*k + 1.at n=41A369563
• Odd Achilles numbers.at n=36A390953