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A195796 Positive integers a for which there is a primitive (-1)-Pythagorean triple (a,b,c) satisfying a<=b. 3
1, 3, 5, 5, 7, 7, 8, 9, 11, 11, 13, 13, 15, 16, 16, 17, 17, 19, 19, 21, 23, 23, 24, 24, 25, 25, 27, 29, 29, 31, 31, 32, 32, 33, 35, 35, 37, 39, 40, 40, 40, 41, 43, 45, 47, 48, 49, 51, 53, 55, 55, 56, 56, 56, 56, 57, 63, 64, 64, 65, 69, 72, 75, 77, 80, 80, 85, 85, 87 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

See A195770 for definitions of k-Pythagorean triple, primitive k-Pythagorean triple, and lists of related sequences.

LINKS

Table of n, a(n) for n=1..69.

EXAMPLE

Primitive (-1)-Pythagorean triples

(c^2=a^2+b^2+k*a*b, where k=-1):

1,1,1

3,8,7

5,8,7

5,21,19

7,15,13

8,40,37

9,15,13

11,65,61

11,35,31

13,96,91

MATHEMATICA

(See A195778.)

CROSSREFS

Cf. A195770, A195778, A195862, A195863.

Sequence in context: A164019 A307701 A103332 * A279944 A309424 A079886

Adjacent sequences:  A195793 A195794 A195795 * A195797 A195798 A195799

KEYWORD

nonn

AUTHOR

Clark Kimberling, Sep 25 2011

STATUS

approved

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Last modified February 26 05:51 EST 2020. Contains 332277 sequences. (Running on oeis4.)