157560

Appears in sequences

• Numbers k such that (k-1, k+1) and (k/2-1, k/2+1) are both pairs of twin primes.at n=24A076504
• Let b(0)=1; b(1)=1; b(n+2) = (Pi^2/6 + 6/Pi^2)*b(n+1) - b(n). a(n) = floor(b(n)).at n=24A093607
• Number of intersection points outside the n-gon of all lines through pairs of vertices of a regular n-gon.at n=37A146213
• Number of finite sequences of distinct sets with total sum n.at n=20A358913
• a(n) = Sum_{k=0..floor(n/3)} binomial(k+3,3) * binomial(k,n-3*k)^2.at n=25A377150