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.

3, 5, 7, 9, 13, 19, 21, 35, 315, 325, 1425

Offset

1,1

Links

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

Nechemia Burshtein, 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, Disc. Math. (2008) Vol. 308, No. 18, 4286-4292. MR2427761 (2009e:11061)

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