A027680 Number of independent subsets of 5^n cube (P_5 X ... X P_5).

2, 13, 55447, 1621477990380993035885

Offset: 0

Author

R. H. Hardin

Keywords

• nonn
• hard
• more

Examples

			For n=0, the two sets are the empty set and a set containing a single isolated vertex. - _Sean A. Irvine_, Nov 20 2019
		

Crossrefs

Cf. A027624, A027667, A027668.

Extensions

a(0) corrected by Sean A. Irvine, Nov 20 2019