login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A166607 Numbers k such that Sum_{i=1..k} i^7 divides Product_{i=1..k} i^7. 5

%I

%S 1,733,1637,2096,2367,4231,5674,5839,7585,8344,13719,13753,14983,

%T 15151,15197,15257,15757,16595,17305,18791,20701,21442,23652,23738,

%U 24519,24789,25474,25916,25933,27474,27487,29185,31455,32846,32950,33421

%N Numbers k such that Sum_{i=1..k} i^7 divides Product_{i=1..k} i^7.

%e a(2) = A125314(7) = 733.

%t With[{c=Range[40000]^7},Flatten[Position[#[[1]]/#[[2]]&/@Thread[ {Rest[ FoldList[ Times,1,c]],Accumulate[c]}],_?IntegerQ]]] (* _Harvey P. Dale_, Nov 16 2014 *)

%Y Cf. A123314, A166602, A060462, A166604, A166605, A166606, A166608, A166609, A166610.

%K nonn

%O 1,2

%A _Alexander Adamchuk_, Oct 18 2009

%E More terms from _Max Alekseyev_, Sep 30 2010

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 24 04:25 EDT 2019. Contains 323528 sequences. (Running on oeis4.)