This site is supported by donations to The OEIS Foundation.

 Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing. Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A299708 Numbers of the form n^2+1 that can be expressed in more than one way as j^2+k^2 with j>k>1. 7
 325, 1025, 1445, 1850, 2210, 3250, 4625, 4901, 5185, 5330, 6725, 6890, 8650, 9605, 9802, 11450, 12545, 13690, 13925, 14885, 15130, 16385, 17425, 17690, 19045, 20165, 20450, 21905, 24650, 26245, 28225, 29585, 29930, 30277, 31330, 33125, 33490 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Hugo Pfoertner, Table of n, a(n) for n = 1..10000 EXAMPLE a(1) = 325 = A299707(1)^2 + 1 = 18^2 + 1 is expressible in two ways:   325 = 17^2 + 6^2 = 15^2 + 10^2. CROSSREFS Cf. A050796, A299707, A300161, A300162, A300163, A300164, A300165, A300166. Sequence in context: A160580 A158272 A183645 * A031714 A133447 A179535 Adjacent sequences:  A299705 A299706 A299707 * A299709 A299710 A299711 KEYWORD nonn AUTHOR Hugo Pfoertner, Feb 27 2018 STATUS approved

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.

Last modified December 9 16:42 EST 2019. Contains 329879 sequences. (Running on oeis4.)