51607

Properties

Appears in sequences

• a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (odd natural numbers), t = (primes).at n=41A025117
• Engel expansion of zeta(10) = Sum_{i>0} 1/i^10.at n=9A067918
• Numbers k such that the first 9 digits of the k-th Lucas number are 1-9 pandigital.at n=19A216489
• Primes p such that prime(p)^2 - 2 = prime(q) for some prime q.at n=43A261354
• Primes of the form prime(i)*prime(i+1)+prime(i+2)*prime(i+3)+...+prime(k-1)*prime(k).at n=20A340465
• The number of lit cells in weakly decreasing partitions of n when light shines from the north west and only the first column is lit. Here partitions are represented from left to right by columns of cells.at n=31A366175
• Prime numbersat n=5282