988663371

Appears in sequences

• Number of free subsets of multiplicative group of GF(7^n).at n=10A007233
• a(n) = (7^n - 1)/2.at n=11A120741
• A sevens sequence: a(n) = (7^n - 1)/(2^(4 - 3*(n mod 2))).at n=11A152418