20620

Appears in sequences

• a(n) = dot_product(1,2,...,n)*(3,4,...,n,1,2).at n=37A026037
• Character of extremal vertex operator algebra of rank 40.at n=2A028519
• Numbers k such that 100k+1, 100k+3, 100k+7, 100k+9 are all primes.at n=29A064687
• Number of polynomials of the form x^n +- x^(n-1) +- x^(n-2) +- ... +- 1 irreducible over the integers.at n=14A087481
• Numerator of Hermite(n, 4/9).at n=4A159232
• G.f. is the fourth power of the g.f. of A006950.at n=14A273228