53411

Properties

Appears in sequences

• Primes whose digits can be rearranged to give the initial terms of the decimal expansion of Pi.at n=17A052493
• Numbers k for which 8*R_k + 1 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=11A096508
• Triangle read by rows: T(n,k) is the number of set partitions of {1,2,...,n} in which the last block is the singleton {k}, 1<=k<=n; the blocks are ordered with increasing least elements.at n=62A108458
• Number of n X 4 0..1 arrays avoiding 0 0 1 and 1 0 0 horizontally and 0 1 1 and 1 1 0 vertically.at n=7A208003
• Primes of the form n^2 + pi(n).at n=34A228865
• Primes p such that A272207(p) = p.at n=26A276030
• E.g.f.: exp(exp(x) - 1)*(exp(3*x) - 2*exp(x) + 1).at n=7A282179
• Record values in A343717.at n=28A343718
• a(n) is the least k such that at least n terms of A063655 starting from index k are strictly decreasing.at n=7A386525
• Prime numbersat n=5447