66299

Appears in sequences

• a(n) equals the (n*(n+1)/2)-th partial sum of the self-convolution 4th power of A010054, which has the g.f.: Sum_{k>=0} x^(k*(k+1)/2).at n=21A109415
• a(n) is the smallest composite squarefree number k such that (p+n) | (k+1) for all primes dividing k.at n=27A274446
• a(n) = prime(n) * prime(2n).at n=38A319613
• Number of strings of length n defined on {0, 1, 2, 3} that contain one or no 1's, two or no 2's, three or no 3's and any number of 0's.at n=12A385407