27105

Appears in sequences

• Self-convolution 5th power of A113671, where a(n) = A113671(n+1)/(n+1).at n=4A113665
• Numbers of the form m = p1 * p2 * p3 * p4 where for each d|m we have (d+m/d)/2 prime and p1 < p2 < p3 < p4 each prime.at n=5A128285
• Main diagonal of polygonal lucky array defined in A128511.at n=12A128947
• a(n) = 56*n^2 + 1.at n=22A158660
• Numbers n such that n contains exactly 5 digits, all distinct, and n^2 contains exactly 9 distinct digits.at n=24A204691
• Number of Lyndon compositions of n that are not weakly increasing.at n=18A329141
• 11-gonal numbers which are products of four distinct primes.at n=4A354086
• a(n) = Sum_{k=0..n} binomial(n,k) * binomial(4*k,k).at n=5A359643