A299707 - OEIS

A299707

Numbers m such that m^2 + 1 can be expressed in more than one way as j^2 + k^2 with j > k > 1.

18, 32, 38, 43, 47, 57, 68, 70, 72, 73, 82, 83, 93, 98, 99, 107, 112, 117, 118, 122, 123, 128, 132, 133, 138, 142, 143, 148, 157, 162, 168, 172, 173, 174, 177, 182, 183, 187, 191, 192, 193, 200, 203, 207, 208, 212, 213, 216, 217, 218, 228, 232, 233, 237, 242, 243, 251, 252

(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) = 18: 18^2 + 1 = 325 = 17^2 + 6^2 = 15^2 + 10^2,

a(2) = 32: 32^2 + 1 = 1025 = 31^2 + 8^2 = 25^2 + 20^2,

a(5) = 47: 47^2 + 1 = 2210 = 43^2 + 19^2 = 41^2 + 23^2 = 37^2 + 29^2.

CROSSREFS

Cf. A050796, A299708, A300161, A300162, A300163, A300164, A300165, A300166.

Sequence in context: A316798 A070744 A137600 * A350958 A045556 A344017

Adjacent sequences: A299704 A299705 A299706 * A299708 A299709 A299710

KEYWORD

nonn

AUTHOR

Hugo Pfoertner, Feb 27 2018

STATUS

approved