28116

Appears in sequences

• Numbers k such that sopfr(k) = sopfr(k + sopfr(k)).at n=28A050780
• Numbers k such that 2^k - 23 is prime.at n=19A057220
• Eleven times hexagonal numbers: a(n) = 11*n*(2*n-1).at n=36A154617
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2 + (x+497)^2 = y^2.at n=24A207077
• G.f. satisfies: A(x) = x + A(A(x))^2 + A(A(x))^3.at n=6A211794
• Number of nX4 arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 nX4 array.at n=5A219848
• T(n,k)=Number of nXk arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 nXk array.at n=41A219852
• Number of 6Xn arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 6Xn array.at n=3A219857
• (Denominators of Cauchy numbers of the second kind hat c_{2n})/6.at n=34A222561
• Total number of parts in all compositions of n with at least two parts in increasing order.at n=13A229935
• Partial sums of A108754.at n=45A307673