137971

Appears in sequences

• Number of self-complementary 2-colored bracelets (turnover necklaces) with 2n beads.at n=18A007148
• a(n) = a(n-1) + 4*a(n-2) + 6*a(n-3) + 4*a(n-4) + a(n-5).at n=13A114749
• a(n) = 1 + Max_{0<=i<=j<=k; i+j+k=n-1} a(i)*a(j)*a(k) for n>0, with a(0) = 1.at n=24A336631