21750

Appears in sequences

• Degrees of irreducible representations of Rudvalis group Ru.at n=8A003918
• Expansion of Product_{m>=1} (1 + m*q^m)^-4.at n=16A022696
• a(1)=2^3*5*7*29=8120; for n>1, a(n) = (-1)sigma(a(n-1)).at n=5A126602
• a(1)=2^3*5*7*29=8120; for n>1, a(n) = (-1)sigma(a(n-1)).at n=13A126602
• a(1)=2^3*5*7*29=8120; for n>1, a(n) = (-1)sigma(a(n-1)).at n=21A126602
• a(1)=2^3*5*7*29=8120; for n>1, a(n) = (-1)sigma(a(n-1)).at n=29A126602
• a(n) = Sum_{d|n} A007955(d) * A008683(n/d) = Sum_{d|n} A007955(d) * mu(n/d), where A007955(m) = number of divisors of m.at n=27A174940
• Number of (w,x,y,z) with all terms in {0,...,n} and (least gapsize)=1.at n=16A212894
• a(n) = (n/2) * (n^3 - 2*n^2 - 2*n + 5).at n=15A242983
• Expansion of f(-x)^2 * f(-x^10) / phi(-x)^3 in powers of x where phi(), f() are Ramanujan theta functions.at n=14A262050
• Number of ways to write n as an ordered sum of 6 primes (counting 1 as a prime).at n=43A341985
• a(0) = 1; a(n) = Sum_{k=0..n-1} binomial(k+6,6) * binomial(n-1,k) * a(k) * a(n-1-k).at n=4A385948