120523

Appears in sequences

• a(n) = floor( sqrt(2) * (3/2)^n ).at n=28A033320
• Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 110-111-010 pattern in any orientation.at n=10A146247
• Number of disconnected 3-regular simple graphs on 2n vertices with girth at least 4.at n=13A185234