A089244 Integer part of square root of the reciprocal of a prime number multiplied by 10 to the power of the integer part of the square root of the number.

7, 5, 44, 37, 301, 277, 2425, 2294, 2085, 18569, 17960, 164398, 156173, 152498, 145864, 1373605, 1301889, 1280368, 12216944, 11867816, 11704114, 11250879, 109764259, 105999788, 101534616

Offset

2,1

Comments

The sum of the reciprocals = 0.40100980056022072540219852776239.. Converges rapidly.

Links

Table of n, a(n) for n=2..26.

Formula

floor( sqrt(1/x)*10^(floor(sqrt(x))) )

Prog

(PARI) rootrecipp(n) = { sr=0; forprime(x=2, n, r =sqrt(x); ip=floor(r); fp=r-ip; y=floor((1/r)*10^ip); print1(y", "); sr = sr + 1.0/y; ); print(); print(sr) }

Crossrefs

Sequence in context: A146382 A163742 A202130 * A063003 A038271 A329008

Adjacent sequences: A089241 A089242 A089243 * A089245 A089246 A089247

Keyword

easy,nonn

Author

Cino Hilliard, Dec 11 2003

Status

approved