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A211139 One of 15 possible sets of eleven odd numbers, not all of the form 3^alpha 5^beta 7^gamma, whose sum of reciprocals is 1. 5
3, 5, 7, 9, 13, 19, 21, 35, 315, 325, 1425 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

Burshtein, Nechemia. All the solutions of the equation Sum_{i=1..11}} 1/x_i = 1 in distinct integers of the form x_i = 3^alpha 5^beta 7^gamma. Discrete Math. 308 (2008), no. 18, 4286--4292. MR2427761 (2009e:11061)

LINKS

Table of n, a(n) for n=1..11.

CROSSREFS

Five of the 15 solutions are shown in A211135-A211139. Cf. A211118-A211134, A201643, A201644, A201646, A201647, A201648, A201649.

Sequence in context: A058871 A126278 A121259 * A089228 A262602 A133847

Adjacent sequences:  A211136 A211137 A211138 * A211140 A211141 A211142

KEYWORD

nonn,fini,full

AUTHOR

N. J. A. Sloane, Apr 02 2012

STATUS

approved

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Last modified September 17 14:07 EDT 2021. Contains 347478 sequences. (Running on oeis4.)