215326

Appears in sequences

• Even pseudoprimes (or primes) to base 2: even numbers k that divide 2^k - 2.at n=2A006935
• Smallest base-2 even pseudoprime (A006935) with exactly n prime factors, or 0 if no such number exists.at n=1A270973
• Number of minimal total dominating sets in the n-barbell graph.at n=30A302650
• Even composites m such that A003499(m)==6 (mod m).at n=23A338311
• Number of n edge connected achiral planar maps with an external face in which all internal faces are triangles.at n=28A378342