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A196122
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Positive integers a for which there is a primitive 4-Pythagorean triple (a,b,c) satisfying a<=b.
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4
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3, 4, 5, 7, 7, 8, 9, 11, 11, 12, 13, 13, 15, 16, 16, 17, 17, 19, 19, 20, 20, 20, 21, 23, 23, 24, 25, 25, 28, 28, 28, 29, 31, 32, 32, 35, 36, 37, 40, 41, 43, 44, 44, 44, 51, 52, 52, 52, 55, 56, 57, 60, 64, 65, 68, 68, 69, 72, 75, 76, 85, 87, 88, 91, 92, 93, 95
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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See A195770 for definitions of k-Pythagorean triple, primitive k-Pythagorean triple, and lists of related sequences.
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LINKS
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Table of n, a(n) for n=1..67.
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EXAMPLE
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Primitive 4-Pythagorean triples a,b,c;
c^2=a^2+b^2+k*a*b, where k=4:
3,8,13
4,5,11
5,28,37
7,12,23
7,60,73
8,33,47
9,104,121
11,40,59
11,160,181
12,85,107
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MATHEMATICA
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(See A196119.)
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CROSSREFS
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Cf. A195770, A196119, A196123, A196124.
Sequence in context: A056190 A202702 A049465 * A071054 A033545 A055495
Adjacent sequences: A196119 A196120 A196121 * A196123 A196124 A196125
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KEYWORD
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nonn
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AUTHOR
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Clark Kimberling, Sep 28 2011
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STATUS
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approved
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