editing

approved

Floor[2^Sqrt[Range[0, 70]]] (* Harvey P. Dale, Aug 03 2016 *)

approved

editing

_Zak Seidov (zakseidov(AT)yahoo.com), _, Mar 18 2010

OEIS Server: https://oeis.org/edit/global/139

a(n)=floor(2^sqrt(n)).

1, 2, 2, 3, 4, 4, 5, 6, 7, 8, 8, 9, 11, 12, 13, 14, 16, 17, 18, 20, 22, 23, 25, 27, 29, 32, 34, 36, 39, 41, 44, 47, 50, 53, 56, 60, 64, 67, 71, 75, 80, 84, 89, 94, 99, 104, 110, 115, 121, 128, 134, 141, 148, 155, 162, 170, 178, 187, 196, 205, 214, 224, 234, 245, 256, 267

0,2

a(0)=floor(2^sqrt(0))=floor(2^0)=1,

a(1)=floor(2^sqrt(1))=floor(2)=2,

a(2)=floor(2^sqrt(2))=floor(2.665)=2.

Cf. A134886 a(n)=floor(n^sqrt(2)).

nonn

Zak Seidov (zakseidov(AT)yahoo.com), Mar 18 2010

approved