A211136 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.

3, 5, 7, 9, 13, 15, 25, 75, 105, 315, 325

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: A177855 A003524 A243910 * A178653 A222314 A228232

Adjacent sequences: A211133 A211134 A211135 * A211137 A211138 A211139

Keyword

nonn,fini,full

Author

N. J. A. Sloane, Apr 02 2012

Status

approved