A299708 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A299708

Numbers of the form m^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