254280

Appears in sequences

• At these values of k, the 1st, 2nd, 3rd and 4th cyclotomic polynomials all give prime numbers.at n=18A070025
• Numbers k such that k-1, k+1, k^2+1 and k^4+1 are all prime numbers.at n=18A070156
• Number of nX4 1..3 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in nondecreasing order.at n=8A166806