39272

Appears in sequences

• Number of (n+1)X(n+1) 0..3 symmetric matrices with every 2X2 subblock having two or four distinct values, and new values 0..3 introduced in lower triangle row major order.at n=3A210833
• Number of length 3 arrays x(i), i=1..3 with x(i) in i..i+n and no value appearing more than 2 times.at n=32A250352
• The sum of the numbers on the perimeter of the n X n diamond frame, located at the top of the numerical pyramid containing the positive integers in natural order.at n=24A359096