A027437 a(n) = floor( e * 2^n ).

2, 5, 10, 21, 43, 86, 173, 347, 695, 1391, 2783, 5567, 11134, 22268, 44536, 89072, 178145, 356290, 712581, 1425162, 2850325, 5700650, 11401300, 22802600, 45605201, 91210402, 182420805, 364841611, 729683222, 1459366444, 2918732888, 5837465777, 11674931554

Offset

0,1

Comments

Parity gives A004593 (expansion of e in base 2). - Jeremy Gardiner, Nov 03 2020.

Links

Table of n, a(n) for n=0..32.

Mathematica

Floor[E 2^Range[0, 30]] (* Harvey P. Dale, May 19 2019 *)

Prog

(PARI) a(n) = floor(exp(1)*2^n) \\ Michel Marcus, Jul 12 2013

Crossrefs

Cf. A001113, A027438 (largest prime factor of [e*2^n]).

Sequence in context: A245747 A032283 A266248 * A267444 A267880 A101510

Adjacent sequences: A027434 A027435 A027436 * A027438 A027439 A027440

Keyword

nonn

Author

N. J. A. Sloane, Allan C. Wechsler

Extensions

a(28)-a(32) from Robert Price, Apr 07 2021

Status

approved