64681
domain: N
Appears in sequences
- Bruckman-Lucas pseudoprimes: k | (L_k - 1), where k is composite and L_k = Lucas numbers A000032.at n=17A005845
- Strong pseudoprimes to base 7.at n=14A020233
- Strong pseudoprimes to base 19.at n=28A020245
- Strong pseudoprimes to base 20.at n=20A020246
- Strong pseudoprimes to base 48.at n=26A020274
- Strong pseudoprimes to base 49.at n=23A020275
- Strong pseudoprimes to base 66.at n=24A020292
- Strong pseudoprimes to base 67.at n=21A020293
- Strong pseudoprimes to base 68.at n=36A020294
- Strong pseudoprimes to base 73.at n=20A020299
- Composite n coprime to 5 such that Fibonacci(n) == Legendre(n,5) (mod n).at n=19A049062
- Primitive part of Lucas(n).at n=34A061447
- Composite numbers k such that k divides F(k-1) where F(j) are the Fibonacci numbers.at n=18A069106
- Sequence arising from factorization of the Fibonacci numbers.at n=34A072183
- Odd Fibonacci pseudoprimes: odd composite numbers k such that either (1) k divides Fibonacci(k-1) if k == +-1 (mod 5) or (2) k divides Fibonacci(k+1) if k == +-2 (mod 5).at n=34A081264
- Nonprimes n such that Mod(n,4) == 1 and denominator(Fibonacci((n-1)/4)/n) = 1.at n=6A091982
- Composite k such that Fibonacci(k) == Legendre(k,5) == 1 (mod k).at n=13A093372
- Odd composites m that divide Fibonacci(m)-1.at n=24A094394
- Composite n such that n divides both Fibonacci(n-1) and Fibonacci(n) - 1.at n=8A094401
- Sum of parts, counted without multiplicities, in all partitions of n into odd parts.at n=45A116930