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A087719 Least number m such that the number of numbers k<=m with k>spf(k)^n exceeds the number of numbers with k<=spf(k)^n. 0
15, 27, 57, 135, 345, 927, 2577, 7335, 21225, 62127, 183297, 543735, 1618905 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

m<a(n): #{k: k>spf(k)^n & 1<=k<=m} <= m/2;

m>=a(n): #{k: k>spf(k)^n & 1<=k<=m} > m/2.

FORMULA

Numbers so far satisfy a(n) = 3^n + 3*2^n + 6. - R. Stephan, May 10 2004

CROSSREFS

Cf. A088382, A088382, A088380, A088381, A000430, A080257.

Sequence in context: A097222 A004069 A110978 * A174216 A116070 A186074

Adjacent sequences:  A087716 A087717 A087718 * A087720 A087721 A087722

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Sep 29 2003

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Last modified February 17 19:13 EST 2012. Contains 206085 sequences.