A177887 The areas of Pythagorean triangles divided by 6.

1, 4, 5, 9, 10, 14, 16, 20, 25, 30, 35, 36, 40, 45, 49, 55, 56, 64, 80, 81, 84, 90, 91, 100, 105, 120, 121, 125, 126, 140, 144, 154, 160, 165, 169, 180, 196, 204, 220, 224, 225, 231, 245, 250, 256, 260, 270, 285, 286, 289, 315, 320, 324, 336, 350, 360, 361, 364, 385, 390

Offset: 1

Author

Robert G. Wilson v, Dec 14 2010

Keywords

• nonn

Comments

Number of terms less than 10^k: 4, 23, 109, 462, 1861, 7255, 27042, 95703, 314534, ..., .

This is A009112/6. - T. D. Noe, Oct 08 2013

Same as A256418/24, i.e., congrua/24. - Jonathan Sondow, Nov 07 2017

References

• Albert H. Beiler, Recreations in the Theory of Numbers, The Queen of Mathematics Entertains, 2nd Ed., Chpt. XIV, "The Eternal Triangle", pp. 104-134, Dover Publ., NY, 1964.

Crossrefs

Cf. A009112, A256418.

Programs

Mathematica

(* First run the program given for A009112 *) Union[t/6]

Formula

A009112(n)/6.