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A088860 Least number m divisible by 4 such that omega(m)=n, where omega=A001221. 1
4, 12, 60, 420, 6420, 6060, 1021020, 19399380, 446185740, 12939386460, 401120980260, 14841476269620, 6085005270554420, 26165522663340060, 1229779565176982820, 65178316954380089460, 3845520700308425278140 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

Refers to the least number which is the leg of exactly 2^(n-1) primitive Pythagorean triangles.

FORMULA

a(n)=2*#p(n)=2*A002110(n)

CROSSREFS

Sequence in context: A054719 A083484 A097250 * A188328 A071769 A000843

Adjacent sequences:  A088857 A088858 A088859 * A088861 A088862 A088863

KEYWORD

nonn

AUTHOR

Lekraj Beedassy (blekraj(AT)yahoo.com), Nov 25 2003

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Last modified February 17 10:05 EST 2012. Contains 206009 sequences.