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A103670 Smallest m such that A102730(m) = n. 1
0, 1, 2, 3, 4, 5, 8, 23, 117, 155, 1410, 3702 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Reinhard Zumkeller conjectures (at A102730) that this sequence is finite. I conjecture the contrary, that a(n) exists for every n.  Further, I expect a(n) << n^n. [Charles R Greathouse IV, Aug 21 2011]

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

a(6) = 5: A102730(5) = #{0,1,2,3,4,5} = 6;

a(7) = 8: A102730(8) = #{0,1,2,3,4,7,8} = 7;

a(8) = 23: A102730(23) = #{0,1,2,3,4,5,6,23} = 8;

a(9) = 117: A102730(117) = #{0,1,2,3,4,5,6,7,117} = 9;

a(10) = 155: A102730(155) = #{0,1,2,3,4,5,6,7,8,155} = 10.

CROSSREFS

Sequence in context: A057657 A116657 A079383 * A105950 A227778 A166276

Adjacent sequences:  A103667 A103668 A103669 * A103671 A103672 A103673

KEYWORD

nonn,hard

AUTHOR

Reinhard Zumkeller, Feb 12 2005

EXTENSIONS

a(11) and a(12) from D. S. McNeil, Aug 21 2011

STATUS

approved

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Last modified December 20 03:36 EST 2014. Contains 252241 sequences.