A196122 Positive integers a for which there is a primitive 4-Pythagorean triple (a,b,c) satisfying a<=b.

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

Offset: 1

Author

Clark Kimberling, Sep 28 2011

Keywords

• nonn

Comments

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

Examples

			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
		

Crossrefs

Cf. A195770, A196119, A196123, A196124.

Programs

Mathematica

(See A196119.)