131407

Appears in sequences

• Strong pseudoprimes to base 31.at n=22A020257
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 49 ones.at n=27A031817
• Number of n X n binary arrays with all ones connected only in a 1100-0111-0011 pattern in any orientation.at n=7A147209
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-0111-0011 pattern in any orientation.at n=16A147211
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-0111-0011 pattern in any orientation.at n=17A147211