674520

Appears in sequences

• Numbers that can be expressed as the difference of the squares of primes in exactly fifteen distinct ways.at n=6A092011
• Number of walks of length n between two nodes at distance 2 in the cycle graph C_7.at n=20A095307
• T(n,k)=Number of length n+5 0..k arrays with no disjoint triples in any consecutive six terms having the same sum.at n=36A247995
• Number of length 1+5 0..n arrays with no disjoint triples in any consecutive six terms having the same sum.at n=8A247996
• G.f. A(x,y) satisfies: A( x - y*G(x,y), y) = x + (1-y)*G(x,y) such that G(x,y) = Integral A(x,y) dx, where the coefficients T(n,k) of x^n*y^k form a triangle read by rows n>=1, for k=0..n-1.at n=32A277410
• Expansion of e.g.f. 1 / (1 - x - x^2/2 - x^3/3).at n=8A355293
• Least positive integer m such that sigma(m)/phi(m) = n + 1/2, where sigma(.) and phi(.) are given by A000203 and A000010, respectively.at n=17A375262