23970

Appears in sequences

• a(n) = s(1)*t(n) + s(2)*t(n-1) + ... + s(k)*t(n+1-k), where k = [ (n+1)/2 ], s = (Fibonacci numbers), t = (Lucas numbers).at n=16A024459
• Numbers k such that 127*2^k+1 is prime.at n=19A032413
• p(11p-7) where p is prime.at n=14A098998
• Number of compositions of n whose non-adjacent parts are weakly decreasing.at n=28A333148
• Triangle read by rows: T(n,k) is the number of planar tanglegrams of size n with irreducible component of size k.at n=40A371659