42340

Appears in sequences

• Divide primes in groups with 2n elements and add together.at n=15A109726
• 2n^4+6n^2+4 = 2(n^2+1)(n^2+2).at n=11A120571
• a(n) = n*(n+1)*(5*n+1)/3.at n=29A174814
• Number of 6-step S, E, and NW-moving king's tours on an n X n board summed over all starting positions.at n=20A187511
• Expansion of (G(-x) / chi(-x))^2 in powers of x where chi() is a Ramanujan theta function and G() is a Rogers-Ramanujan function.at n=34A261866
• Number of involutions of [n] having exactly one peak.at n=25A303649