41771

Properties

Appears in sequences

• a(n) = a(1) + a(2) + ... + a(n-1) - a(m) for n >= 4, where m = 2*n - 2 - 2^(p+1) and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = a(2) = 1 and a(3) = 3.at n=18A049895
• Primes of the form 3*m^2 - 1.at n=29A089682
• Primes p such that 5*p - 6 is square.at n=24A110482
• Numbers k such that k and k^2 use only the digits 1, 4, 6, 7 and 8.at n=13A137052
• Primes of the form 12*n^2-1.at n=28A143830
• Primes p such that 12*p^3+-1 are twin primes.at n=22A158297
• Lesser of two consecutive primes, p < q, such that p*q + p - q and p*q - p + q are also consecutive primes.at n=20A225726
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 539", based on the 5-celled von Neumann neighborhood.at n=34A272803
• Prime numbersat n=4368