23923

Appears in sequences

• Expansion of (1 -x -sqrt(1-2*x-11*x^2))/(6*x^2).at n=9A025237
• Prime(a(n)) + ... + prime(a(n)+3) is a square = A051395(n)^2.at n=25A072849
• Numbers k such that 10*(10^(k+1) + 10^k - 1) + 7 is prime.at n=22A123368
• a(n) = greatest entry in row n of A184957.at n=20A188624
• A bisection of A188624.at n=10A188625
• Number of connected simple graphs for which D.x = 1 has no solutions when D is the distance matrix.at n=9A354465