47881

Properties

Appears in sequences

• Expansion of e.g.f. tan(sinh(x)) (odd powers only).at n=4A003716
• a(1) = 1, a(n+1) = Sum_{k = 1..n} p(k)*a(n+1-k), where p(k) is the k-th prime.at n=9A030017
• Numbers k such that k-th and (k+1)-st term of A038593 differ by 3.at n=34A038634
• Primes with 29 as smallest positive primitive root.at n=10A061733
• Primes p such that p*(p-2) divides 2^(p-1)-1.at n=15A081762
• Primes p such that p*(p-2) divides 3^(p-1)-1.at n=13A081764
• Expansion of 1/sqrt(1-2x-47x^2).at n=6A098439
• Primes of the form 1+2*n+3*n^2.at n=17A122430
• Fibonacci central tridiagonal matrices as a triangular sequence from a recursive polynomial definition.at n=51A123974
• Primes of the form n^2 + (n+1)^3.at n=9A155933
• Primes of the form ((p+1)/2)^3 + ((p-1)/2)^2 where p is prime.at n=7A163428
• a(n) = n^3 + (1-n)^2.at n=36A168297
• a(n) = (1/4)*(n^2 - 5*n + 2)*(n-2)! + 1.at n=7A173038
• Triangle T(n, k) = n!*(1/k)^2*(binomial(n-1, k-1)*binomial(n, k-1))^2 - n! + 1, read by rows.at n=12A174696
• Primes p such that p^2 divides 2^(2^(p-1)-1) - 1.at n=38A188465
• Primes of the form 2520k + 1 for some k.at n=9A217588
• Primes p of the form p = 1 + 840*k for some k.at n=25A217862
• a(n) is the smallest prime p > n which cannot become prime by removing any number of initial digits in bases 2,...,n.at n=5A221700
• a(n) is the smallest prime p > n which cannot become prime by removing any number of initial digits in bases 2,...,n.at n=6A221700
• a(n) is the smallest prime p > n which cannot become prime by removing any number of initial digits in bases 2,...,n.at n=7A221700