A227212 Generalized Markoff numbers: largest of 7-tuple of positive numbers a, b, c, d, e, f, g satisfying the Markoff(7) equation a^2+b^2+c^2+d^2+e^2+f^2+g^2 = 5abcdefg.

2, 3, 9, 14, 43, 67, 89, 206, 209, 321, 881, 987, 1538, 1934, 3121, 4003, 4689, 4729, 7369, 8009, 8721, 14627, 22658, 35307, 43889, 44289, 46606, 86329, 86987

Offset

1,1

Links

Table of n, a(n) for n=1..29.

Example

a(1)=2 and a(2)=3 since (2, 1, 1, 1, 1, 1, 1) and (3, 1, 1, 1, 1, 1, 1) satisfying a^2+b^2+c^2+d^2+e^2+f^2+g^2=5abcdefg.

Crossrefs

Cf. A227210, A227211, A227214.

Sequence in context: A047171 A094557 A222658 * A237254 A026307 A139816

Adjacent sequences: A227209 A227210 A227211 * A227213 A227214 A227215

Keyword

nonn,more

Author

Shanzhen Gao, Sep 19 2013

Status

approved