71784

Appears in sequences

• Numbers n such that 3*2^(n-1) - 1 is prime.at n=39A091997
• a(n) = n*(n+5)*(50+45*n+n^2)/24.at n=26A101861
• G.f. satisfies A(x) = exp( Sum_{n>=1} (A(x^n) + A(-x^n))/2 * x^n/n ).at n=24A195865
• Number of nondecreasing -4..4 vectors of length n whose dot product with some lexicographically greater or equal nondecreasing -4..4 vector equals n.at n=10A226418
• Number of unlabeled rooted trees with 2n + 1 nodes in which all outdegrees are even.at n=12A295461