87540

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 = 1,2,17.at n=25A064245
• Numbers j such that j and 2j are both between a pair of twin primes.at n=27A066388
• A binomial recursion: a(n) is the coefficient of x in z(n), where z(1) = x and z(n) = 1 + Sum_{k=1..n-1} (binomial(n,k) + 1)*z(k) for n > 1.at n=6A135074
• Averages of twin primes such that p1*p2 -+ AverageTwinPrime are primes.at n=17A154668
• Numbers m such that exactly four subsets of {m-1, m, m+1} sum up to a prime number.at n=30A221310
• Triangle read by rows: T(m,n) (m >= n >= 1) = number of edges formed by drawing the line segments connecting any two of the (m+1) X (n+1) lattice points in an m X n grid of squares and extending them to the boundary of the grid.at n=20A333283