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A037162 Well-order the rational numbers; take denominators. 1
1, 1, 1, 1, 2, 2, 1, 1, 3, 3, 1, 1, 2, 3, 4, 4, 3, 2, 1, 1, 5, 5, 1, 1, 2, 3, 4, 5, 6, 6, 5, 4, 3, 2, 1, 1, 3, 5, 7, 7, 5, 3, 1, 1, 2, 4, 5, 7, 8, 8, 7, 5, 4, 2, 1, 1, 3, 7, 9, 9, 7, 3, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1 (list; graph; refs; listen; history; internal format)
OFFSET

0,5

REFERENCES

Sierpinski, Cardinal and Ordinal Numbers, Warsaw 1965, 2nd ed., p. 40.

CROSSREFS

Cf. A037161.

Sequence in context: A094267 A136480 A050603 * A027358 A191781 A155092

Adjacent sequences:  A037159 A037160 A037161 * A037163 A037164 A037165

KEYWORD

nonn,easy,nice,frac

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 16 14:37 EST 2012. Contains 205930 sequences.