A119641 Prime numbers of trees with n unlabeled nodes.

2, 3, 11, 23, 47, 1301, 7741, 83453838443384019701, 3497830604170469202903845457503189, 3043448204076362393100321053325760617159315927820231750001

Offset: 1

Author

Jorge Coveiro, Jul 27 2006

Keywords

• nonn

Crossrefs

Cf. A000055, A119642.

Formula

A000040 INTERSECTION A000055.

a(n) = A000055(A119642(n)). - Amiram Eldar, Apr 22 2018

Extensions

Offset changed by Michel Marcus, Apr 23 2018