A027668 Number of independent subsets of nodes of 4^n cube (P_4 X ... X P_4).
2, 8, 1234, 121039421240
Offset: 0
Extensions
a(0) corrected by Sean A. Irvine, Nov 16 2019
This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
For n=0, the two sets are the empty set and a set containing a single isolated vertex. - _Sean A. Irvine_, Nov 20 2019