150624

Appears in sequences

• Glaisher's function U(n).at n=26A002612
• Numbers n such that determinant[{{n,phi(n)},{n+1,phi(n+1)}}]is a perfect square.at n=22A067571
• Number of unlabeled rooted trees with n nodes such that the minimal outdegree of inner nodes equals 8.at n=53A244462
• Number of length 2+2 0..n arrays with the sum of the maximum minus twice the median plus the minimum of adjacent triples multiplied by some arrangement of +-1 equal to zero.at n=36A251429
• T(n,k) is the sum of the permanents of all k X k submatrices in the n X n Pascal matrix; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=33A369559