Integer Sequence Generator
Description
Generates well-known integer sequences.
'Rmpfr' package is adopted for computing with arbitrarily large numbers with user-specified bit precision.
Every function has hyperlink to its corresponding item in OEIS (The On-Line Encyclopedia of Integer Sequences)
in the function help page. For interested readers, see Sloane and Plouffe (1995, ISBN:978-0125586306).