1855179

Appears in sequences

• Pseudo-powers to base 3: numbers k that are not powers of 3 such that k divides 2^k + 1.at n=32A016057
• Primitive pseudo-powers to base 3.at n=8A016058
• Numbers k such that 2^(2^k+1) == -1 (mod k^2).at n=6A377026