A221206 a(n) = nearest integer to sqrt(10^n/log(10^n)).

2, 5, 12, 33, 93, 269, 788, 2330, 6947, 20840, 62834, 190240, 577990, 1761279, 5380796, 16475256, 50543777, 155330201, 478096270, 1473591670, 4547602623, 14050145290, 43453847676, 134519899690, 416794664987, 1292425391245, 4010608533780, 12454122695249

Offset

1,1

Comments

The terms 2, 5, 12, 33 are found in other sequences.

Links

Vladimir Pletser, Table of n, a(n) for n = 1..100

Formula

a(n) = round(sqrt(10^n / log(10^n))).

Maple

a:=n-> round(sqrt((10^n)/ln(10^n))): seq(a(n), n=1..30);

Crossrefs

Sequence in context: A000669 A295461 A191769 * A281489 A225616 A186739

Adjacent sequences: A221203 A221204 A221205 * A221207 A221208 A221209

Keyword

easy,nonn

Author

Vladimir Pletser, Jan 04 2013

Status

approved