A065709 - OEIS

A065709

Reduced sequence related to reciprocal Pythagorean triples: 1/a(n)^2 + 1/k^2 = 1/j^2 has an integer solution (k,j) with k<a(n) and a(n) not a multiple of 20.

156, 255, 312, 468, 510, 609, 624, 765, 936, 1092, 1218, 1248, 1275, 1295, 1404, 1530, 1716, 1785, 1827, 1872, 2028, 2184, 2295, 2385, 2436, 2496, 2550, 2590, 2652, 2805, 2808, 2964, 3045, 3276, 3315, 3432, 3570, 3588, 3654, 3744, 3825, 3885, 4015, 4056, 4095

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..45.

EXAMPLE

a(10)=1218: 1/a(10)^2 + 1/1160^2 = 1/840^2

CROSSREFS

A065607 (includes multiples of 20)

Sequence in context: A295221 A052477 A166397 * A037983 A298909 A366172

Adjacent sequences: A065706 A065707 A065708 * A065710 A065711 A065712

KEYWORD

nonn

AUTHOR

Len Smiley, Dec 04 2001

EXTENSIONS

Offset corrected and more terms from Sean A. Irvine, Sep 09 2023

STATUS

approved