2727839

Properties

Appears in sequences

• Number of subsets of {1,2,...,n} such that no two elements differ by 1, 2, or 5.at n=41A375980
• G.f. A(x) satisfies A(x) = 1 / ((1 - x) * (1 - 2 * x * A(x^4))).at n=18A390661
• Prime numbersat n=198516