72579

Appears in sequences

• Expansion of (1 + 2*x^3)/(1 - x - 4*x^7).at n=32A098528
• a(n) = (p*(p+4)+1)/2 where (p,p+4) are the n-th cousin prime pair.at n=20A163634
• Numbers k such that phi(k) = phi(k+2) - phi(k+1).at n=29A229552
• a(n) = Sum_{k=1..n} binomial(floor(n/k)+3,4).at n=33A365409