21896

Appears in sequences

• Least sum of 4 positive cubes in exactly n ways.at n=9A025420
• Least sum of 4 distinct positive cubes in exactly n ways.at n=7A025421
• Denominators of continued fraction convergents to sqrt(195).at n=7A041363
• Column 3 of triangle A055907.at n=15A055909
• Difference between product of divisors of n and sum of divisors of n.at n=27A076721
• Least number which is the sum of four nonnegative cubes (not necessarily distinct and including zero) in n ways.at n=9A076749
• a(n) is the number of terms in the expansion of (x+y-z)*(x^2+y^2-z^2)*(x^3+y^3-z^3)*...*(x^n+y^n-z^n).at n=19A086817
• Chebyshev polynomials of the second kind, U(n,x), evaluated at x=14.at n=4A097311
• Numbers k such that 3^(2*k-1) + 2 is prime.at n=14A134753
• Chebyshev polynomial of the second kind U(3,n).at n=14A144138
• Number of ways to place 2 queens on an n X n chessboard so that they attack each other.at n=23A144945
• Number of 4-step one space at a time bishop's tours on an n X n board summed over all starting positions.at n=26A187157
• Members of a pair (m,k) such that sigma(m) = sigma(k) = sigma(m+k), m < k where sigma = A000203.at n=8A239436
• Members of a pair (m,n) such that sigma(m) = sigma(n) = sigma(n-m), m < n where sigma = A000203.at n=16A239939
• a(n) = n^3 - 2*n.at n=28A242135
• Numbers that are the sum of four third powers in nine or more ways.at n=0A345146
• Numbers that are the sum of four third powers in six or more ways.at n=33A345148
• Numbers that are the sum of four third powers in seven or more ways.at n=5A345150
• Numbers that are the sum of four third powers in eight or more ways.at n=0A345152
• Numbers that are the sum of four third powers in ten or more ways.at n=0A345155