127643

Properties

Appears in sequences

• Primes prime(k) for which A049076(k) = 4.at n=33A049080
• Number of fixed points of permutation of SetPartitions under {1,2,...,n}->{n,n-1,...,1}. Number of symmetric arrangements of non-attacking rooks on upper half of n X n chessboard.at n=15A080107
• Bisection of A080107.at n=7A080337
• Balanced primes p of the form (r+q+s-1)/2, where r, q, s are consecutive primes.at n=24A129191
• Primes p such that continued fraction of (1 + sqrt(p))/2 has period 10 : primes in A146335.at n=32A146355
• a(n) = 6561*n^2 - 7732*n + 2278.at n=4A157376
• Number A(n,k) of length-n restricted growth strings (RGS) with growth <= k and fixed first element; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=63A305962
• Prime numbers with prime indices in A333243.at n=37A333244
• Prime numbersat n=11953