81930

Appears in sequences

• Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,51.at n=22A064262
• Numbers j such that j and 2j are both between a pair of twin primes.at n=26A066388
• Expansion of x(1-2x+3x^2)/(1-x-2x)^2;.at n=15A099431
• a(n) is a non-palindromic composite located between twin primes whose reverse, which is less than it, is also located between twin primes.at n=29A103741
• Averages of twin prime pairs of the form : sum of two or more consecutive squares.at n=25A174716
• Numbers m such that exactly four subsets of {m-1, m, m+1} sum up to a prime number.at n=29A221310
• Expansion of e.g.f. f(x)^3 * log(f(x)), where f(x) = 1/(1 - 5*x)^(1/5).at n=5A383233