A030849 Floor( exp(4/21)*n! ).

1, 2, 7, 29, 145, 871, 6097, 48780, 439021, 4390215, 48292365, 579508382, 7533608975, 105470525661, 1582057884925, 25312926158801, 430319744699629, 7745755404593338, 147169352687273431, 2943387053745468625, 61811128128654841137

Offset

1,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..200

Mathematica

Floor[Exp[4/21]Range[20]!] (* Harvey P. Dale, Feb 05 2014 *)

Prog

(Magma) [Floor(Exp(4/21)* Factorial(n)): n in [1..25]]; // Vincenzo Librandi, Feb 06 2014

Crossrefs

Sequence in context: A265000 A347431 A355254 * A185109 A030973 A295225

Adjacent sequences: A030846 A030847 A030848 * A030850 A030851 A030852

Keyword

nonn

Author

Simon Plouffe

Extensions

a(21) from Vincenzo Librandi, Feb 06 2014

Status

approved