27230

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 66.at n=4A031744
• Numbers that are sums of 2 or more consecutive squares in more than 1 way.at n=34A062681
• Triangle arising from (4,2) tennis ball problem, read by rows.at n=35A078990
• a(n) = (2*4^n*binomial(2*n, n) - binomial(4*n + 1, 2*n)) / (n + 1).at n=5A079489
• Second column of triangular array in A079513.at n=10A079514
• Absolute value of coefficient of x^3 in polynomial whose zeros are 5 consecutive integers starting with the n-th integer.at n=10A127694
• a(n) = 25*n^2 + 5.at n=32A158445
• Numbers n for which phi(n) = phi(n-1) - phi(n+1).at n=3A220160
• Expansion of 1/G(1) where G(k) = 1 - (q*(1+q))^k / G(k+1).at n=13A238436
• Expansion of Product_{k>=1} ((1 + k*x^k) / (1 - k*x^k))^k.at n=9A266942
• Expansion of Sum_{i>=1} x^(i^3) / (1 - Sum_{j>=1} x^(j^3))^2.at n=38A281809
• Numbers k such that Bernoulli number B_{k} has denominator 4686.at n=22A295770
• Numbers that can be written as the sum of four or more consecutive squares in more than one way.at n=25A307937