157770

Appears in sequences

• Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row and column sum 2 4 5 or 7 and every diagonal and antidiagonal sum not 2 4 5 or 7.at n=8A251917
• Numbers n such that n-23, n-1, n+1 and n+23 are consecutive primes.at n=2A263298
• Place n equally spaced points on each side of an equilateral triangle, and join each of these points by a chord to the 2*n new points on the other two sides: sequence gives number of regions in the resulting planar graph.at n=17A366486