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A078705 Integer part of the square root of sigma(n). 1
1, 1, 2, 2, 2, 3, 2, 3, 3, 4, 3, 5, 3, 4, 4, 5, 4, 6, 4, 6, 5, 6, 4, 7, 5, 6, 6, 7, 5, 8, 5, 7, 6, 7, 6, 9, 6, 7, 7, 9, 6, 9, 6, 9, 8, 8, 6, 11, 7, 9, 8, 9, 7, 10, 8, 10, 8, 9, 7, 12, 7, 9, 10, 11, 9, 12, 8, 11, 9, 12, 8, 13, 8, 10, 11, 11, 9, 12, 8, 13, 11, 11, 9, 14, 10, 11, 10, 13, 9, 15, 10, 12, 11 (list; graph; refs; listen; history; internal format)
OFFSET

1,3

MATHEMATICA

Table[Floor[Sqrt[DivisorSigma[1, i]]], {i, 1, 100}]

CROSSREFS

Sequence in context: A181630 A112310 A137734 * A050331 A194344 A128435

Adjacent sequences:  A078702 A078703 A078704 * A078706 A078707 A078708

KEYWORD

easy,nonn

AUTHOR

Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Dec 18 2002

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Last modified February 15 19:15 EST 2012. Contains 205852 sequences.