143095

Appears in sequences

• Number of (n+1)X(n+1) -10..10 symmetric matrices with every 2X2 subblock having sum zero and one or three distinct values.at n=10A211815
• Numbers k such that 387*2^k+1 is prime.at n=26A323038
• a(n) is the first semiprime k such that there are as many semiprimes as possible in the n numbers starting at k.at n=10A368683
• a(n) is the first semiprime k such that there are as many semiprimes as possible in the n numbers starting at k.at n=11A368683
• Numbers of uniquely embeddable planar connected graphs on n vertices.at n=9A372853