30811

Appears in sequences

• Pseudoprimes to base 7.at n=39A005938
• Strong pseudoprimes to base 49.at n=15A020275
• E.g.f. satisfies A(x) = exp(x + x^2*A(x)^2).at n=6A143768
• Expansion of Molien series for the ring of genus 5 code polynomials for Type II codes.at n=14A144060
• a(n) is the smallest integer k such that log(1/log((1+k)^(1/k))) > n.at n=7A145914
• The number of distinct (up to unitary similarity) *-subalgebras of the n X n complex matrices.at n=19A215925
• Partial sums of A008531, or crystal ball sequence for {A_4}* lattice.at n=12A222408
• a(n) = floor(5*prime(n)^2 / 4).at n=36A246010
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,k) = n! * Sum_{j=0..floor(n/2)} (k/2)^j * (2*j+1)^(n-j-1) / (j! * (n-2*j)!).at n=42A362483
• Centered 10-gonal numbers which are products of two primes.at n=34A367792