68719214593
domain: N
Appears in sequences
- Cyclotomic polynomials at x=-4.at n=27A020503
- a(n) = 4^n - 2^n + 1.at n=18A020515
- 12th cyclotomic polynomial evaluated at powers of 2.at n=9A020520
- a(n) = n^12 - n^6 + 1.at n=8A060896
- Zeroless pandigital strong pseudoprimes (base-2).at n=13A113640
- a(n) is the least base-2 overpseudoprime k such that the multiplicative order of 2 mod k equals 8*n+20.at n=10A141629
- Numbers that are both Poulet and Proth.at n=17A242880
- Numbers of the form (4^(p^(k+1)) + 1)/(4^(p^k) + 1), where k >= 1 and p is an odd prime other than 5.at n=1A371757