Example image of eyePlorer eyePlorer map for 'Sylvester's sequence': Integer Number theory Sequence 2 (number) 3 (number) 43 (number) 7 (number) James Joseph Sylvester Double exponential function Multiplicative inverse Series (mathematics) Unit fraction Integer factorization Recurrence relation Egyptian fraction Einstein manifold Online algorithm Sasakian manifold Empty product Greedy algorithm for Egyptian fractions Odd greedy expansion Algorithm Fermat number Erdős conjecture Coprime Prime number Square-free integer Differential topology Exotic sphere N-sphere Bin packing problem Riemannian manifold Sphere Znám's problem Nondeterministic finite state machine Group (mathematics) Perfect number Upper and lower bounds Cahen's constant Primary pseudoperfect number 1987 (number) 42 (number) Higgs prime 1000 (number) Million