A084676 Position of the first zero in the decimal expansion of the square root of the n-th prime.

14, 5, 5, 11, 10, 3, 6, 13, 26, 9, 13, 2, 3, 12, 9, 4, 15, 4, 24, 19, 5, 19, 4, 11, 9, 1, 1, 1, 1, 1, 23, 18, 4, 40, 4, 7, 9, 13, 14, 16, 6, 9, 5, 16, 3, 4, 9, 12, 3, 11, 18, 14, 14, 27, 3, 11, 4, 6, 12, 6, 7, 34, 48, 9, 7, 4, 7, 11, 9, 16, 12, 50, 9, 7, 18, 5, 6, 34, 1, 1, 1, 1, 1, 1, 1, 3, 8

Offset

1,1

Links

Table of n, a(n) for n=1..87.

Example

sqrt(1213) = 34.82814953453599722269575212191436263382649518168323557106085786016708, first zero is at position 57.

Prog

(PARI) \ zeros in sqrt(p) where p is prime. frootp(n) = { default(realprecision, 100); forprime(x=2, n, r = sqrt(x); \ print(x" "r); v = Vec(Str(r)); c=-1; for(y=1, 100, c++; if(v[y] == "0", print1(c", "); break) ) ) }

Crossrefs

Cf. A074850.

Sequence in context: A124600 A340715 A344046 * A180848 A331482 A068609

Adjacent sequences: A084673 A084674 A084675 * A084677 A084678 A084679

Keyword

easy,nonn,base

Author

Cino Hilliard, Jun 29 2003

Status

approved