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 A031174 Intermediate edge b of smallest (measured by the longest edge) primitive Euler bricks (a, b, c, sqrt(a^2 + b^2), sqrt(b^2 + c^2), sqrt(a^2 + c^2) are integers). 18
 117, 252, 480, 132, 231, 1100, 1020, 880, 855, 2475, 2035, 2295, 5796, 748, 6300, 4576, 4888, 1672, 9152, 9828, 3536, 1100, 4901, 1881, 11753, 8820, 10560, 16929, 15400, 14160, 18368, 17157, 24080, 17472, 15232, 23751, 10725, 13728 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Primitive means that gcd(a,b,c) = 1. See A031173 for a list of the 3356 primitive bricks with c < b < a < 5*10^8. - Giovanni Resta, Mar 23 2014 REFERENCES Calculated by F. Helenius (fredh(AT)ix.netcom.com). LINKS Giovanni Resta, Table of n, a(n) for n = 1..3556 R. R. Gallyamov, I. R. Kadyrov, D. D. Kashelevskiy, A fast modulo primes algorithm for searching perfect cuboids and its implementation, arXiv preprint arXiv:1601.00636 [math.NT], 2016. A. A. Masharov and R. A. Sharipov, A strategy of numeric search for perfect cuboids in the case of the second cuboid conjecture, arXiv preprint, 2015. J. Ramsden and H. Sharipov, Inverse problems associated with perfect cuboids, arXiv preprint arXiv:1207.6764, 2012. - From N. J. A. Sloane, Dec 23 2012 J. Ramsden and H. Sharipov, On singularities of the inverse problems associated with perfect cuboids, arXiv preprint arXiv:1208.1859, 2012. - From N. J. A. Sloane, Dec 25 2012 Ruslan Sharipov, Perfect cuboids and irreducible polynomials, arXiv:1108.5348, 2011 Ruslan Sharipov, A note on the first cuboid conjecture, arXiv:1109.2534, 2011 Ruslan Sharipov, A note on the second cuboid conjecture. Part I, arXiv:1201.1229, 2012 Ruslan Sharipov, Perfect cuboids and multisymmetric polynomials, arXiv preprint arXiv:1205.3135, 2012. - From N. J. A. Sloane, Oct 22 2012 Ruslan Sharipov, On an ideal of multisymmetric polynomials associated with perfect cuboids, arXiv preprint arXiv:1206.6769, 2012. - From N. J. A. Sloane, Dec 17 2012 Ruslan Sharipov, On the equivalence of cuboid equations and their factor equations, arXiv preprint arXiv:1207.2102, 2012. - From N. J. A. Sloane, Dec 22 2012 Ruslan Sharipov, A biquadratic Diophantine equation associated with perfect cuboids, arXiv preprint arXiv:1207.4081, 2012. - From N. J. A. Sloane, Dec 23 2012 Ruslan Sharipov, On a pair of cubic equations associated with perfect cuboids, arXiv preprint arXiv:1208.0308, 2012. - From N. J. A. Sloane, Dec 23 2012 Ruslan Sharipov, On two elliptic curves associated with perfect cuboids, arXiv preprint arXiv:1208.1227, 2012. - From N. J. A. Sloane, Dec 24 2012 Ruslan Sharipov, Asymptotic estimates for roots of the cuboid characteristic equation in the linear region, arXiv preprint, 2015. Ruslan Sharipov, Reverse asymptotic estimates for roots of the cuboid characteristic equation in the case of the second cuboid conjecture, arXiv preprint, 2015. Ruslan Sharipov, A note on invertible quadratic transformations of the real plane, arXiv preprint arXiv:1507.01861, 2015 Eric Weisstein's World of Mathematics, Euler Brick Index entries for sequences related to bricks CROSSREFS Cf. A031173, A031175. Sequence in context: A064180 A050245 A351574 * A146172 A146189 A063332 Adjacent sequences: A031171 A031172 A031173 * A031175 A031176 A031177 KEYWORD nonn AUTHOR Eric W. Weisstein STATUS approved

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Last modified September 11 16:20 EDT 2024. Contains 375836 sequences. (Running on oeis4.)