

A092801


Standard deviation (rounded) of composites below 10^n.


3



2, 28, 285, 2873, 28795, 288244, 2883807, 28846206, 288514821, 2885502969, 28857521613, 288593332699, 2886069270370
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OFFSET

1,1


COMMENTS

As with the primes in A091716, each succeeding term seems a close multiple of that preceding.
Exact values: a(8)=sqrt(1055690147582754761176900206278/1268700426680407), a(9)=sqrt(2343463734895394416636292841043365/28152824997414728), a(10)=sqrt(758560349177461014920842710257059832362/91106022529587615169). [From Sean A. Irvine, Apr 07 2010]


REFERENCES

John E. Freund, Modern elementary statistics, 5th ed. (PrenticeHall, 1979), pp. 4247


LINKS



EXAMPLE

a(3) = 285 because this is the computed and rounded sample standard deviation of the composites below 10^3.


CROSSREFS



KEYWORD

more,nonn


AUTHOR



EXTENSIONS



STATUS

approved



