A027664 a(n)/10000000 gives sqrt(n) to 7 places.

10000000, 14142136, 17320508, 20000000, 22360680, 24494897, 26457513, 28284271, 30000000, 31622777, 33166248, 34641016, 36055513, 37416574, 38729833, 40000000, 41231056, 42426407, 43588989, 44721360, 45825757, 46904158, 47958315, 48989795, 50000000, 50990195

Offset

1,1

Links

Table of n, a(n) for n=1..26.

Maple

lprint(round(evalf(10000000*sqrt(n))));

Prog

(Python)
from math import isqrt
def A027664(n): return (m:=isqrt(k:=n*10**14))+int(k-m*(m+1)>=1) # Chai Wah Wu, Jul 31 2022

Crossrefs

Sequence in context: A003802 A033425 A153751 * A017179 A017275 A017515

Adjacent sequences: A027661 A027662 A027663 * A027665 A027666 A027667

Keyword

nonn,base

Author

N. J. A. Sloane.

Status

approved