49801

Properties

Appears in sequences

• First member of a prime quadruple in a p^2+p-1 progression.at n=9A057325
• Primes p such that sum of squares of even-position digits equals the sum of squares of odd-position digits of p.at n=20A076168
• Let p run through the primes; write p in base 10 and then interpret it in base 128 getting a number q; if q is prime then adjoin q to the sequence.at n=15A090718
• Numbers k such that 10^k + 3*R_k + 4 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=20A102932
• Primes of the form 20*k^2 + 36*k + 17.at n=18A154419
• Primes of the form (k^2+4)/5.at n=40A245042
• Lexicographically largest increasing sequence of primes for which the continued square root map (see A257574) produces Pi.at n=32A257582
• Primes p such that p = q^2 + 8*r^2 where q and r are also primes.at n=32A260556
• Number of vertices among all distinct circles that can be constructed from the 3 vertices and the equally spaced 3*n points placed on the sides of an equilateral triangle when every pair of the 3 + 3*n points are connected by a circle and where the points lie at the ends of the circle's diameter.at n=8A372731
• Prime numbersat n=5114