81401

Properties

Appears in sequences

• Sums of 5 distinct powers of 5.at n=28A038477
• Largest prime in the numerator of the 2^n sums generated from the set 1, 1/2, 1/3,..., 1/n.at n=10A075226
• Primes which can be expressed as sum of distinct powers of 5.at n=15A077719
• Primes of the form x^3+x^2+x+2.at n=12A088547
• Consider the succession of single digits of the positive even integers: 2 4 6 8 1 0 1 2 1 4 1 6 1 8 2 0 2 2 2 4 ... (A036211). This sequence is the lexicographically earliest sequence of distinct positive odd integers that produces the same succession of digits.at n=37A097968
• 1+n^2+n^3+n^5+n^7; 10101101 in base n.at n=4A123111
• Primes p such that there exist primes p'<p"<p"'<p""<p such that the concatenation of any two among the {p,...,p""} is prime.at n=33A139005
• Primes whose base-5 representation also is the base-2 representation of a prime.at n=11A235462
• Number of cyclic subgroups of the group C_n x C_n x C_n x C_n, where C_n is the cyclic group of order n.at n=42A280184
• Primes of the form p^3 + p^2 + p + 2 where p is prime.at n=6A347075
• Prime numbersat n=7965