6280086

Appears in sequences

• Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001011.at n=13A260499
• a(n+1) = a(n) + p, where p is the largest prime less than a(n); a(1) = 3.at n=22A285010