48629

Appears in sequences

• Number of trees with n unlabeled nodes.at n=17A000055
• Number of unlabeled (and unrooted) trees on n nodes having a centroid.at n=17A027416
• Numbers k such that A109631(k) - A109631(k+1) = A109631(k+2).at n=20A109715
• Numbers k such that Fibonacci(prime(k)) is prime.at n=39A119984
• a(n) = A000984(n) + n.at n=9A134758
• Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0100-0100-1111-0010 pattern in any orientation.at n=15A147033
• Irregular triangular array read by rows. T(n,k) is the number of unlabeled forests of distinct trees on n nodes containing exactly k trees.at n=51A336096