642001
domain: N
Appears in sequences
- Strings giving winning positions in Tchoukaillon (or Mancala) solitaire.at n=13A028931
- Smith numbers which are also base-2 pseudoprimes.at n=6A063844
- Intersection of A001567 and A212502.at n=21A212601
- Poulet numbers (2-pseudoprimes) of the form 144*n^2 + 222*n + 85.at n=13A214017
- Composite numbers k such that k divides Fibonacci(k+1) or Fibonacci(k-1) and 2^(k-1) == 1 (mod k).at n=9A214434
- Fermat pseudoprimes to base 2 that are decagonal.at n=17A321870