9699291

Appears in sequences

• Let p be the n-th prime and let g be the order of 2 mod p (see A014664). Then if g is even, a(n) = p*(2^(g/2) - 1), otherwise a(n) = 2^g - 1.at n=10A135546
• a(n) = AR(n) is the total number of aperiodic k-reverses of n.at n=36A180322
• Number of double palindrome structures of length n using exactly two different symbols.at n=36A328688