64296

Appears in sequences

• Expansion of (1-x)/(1-4*x-6*x^2).at n=7A147518
• Number of ways to place 2 nonattacking wazirs on an n X n board.at n=18A172225
• The Wiener index of the Dutch windmill graph D(6,n) (n>=1).at n=37A180578
• Integers k such that there exists an integer 0<m<k such that (1/sigma(m)^2 + 1/sigma(k)^2)*(m+k)^2 = 1.at n=18A383964