A249518 Value of b in A216515.

1, 3, 29, 29, 5533, 459233379, 1744172093, 52247563671651, 883355242012099, 375232122597949, 2371488550627875869, 82575946109948991589368825757, 3036351832165747475453064886532125, 545386932955383952248507479703588835, 11628995674391064154406189307992618454723

Offset

1,2

Links

Table of n, a(n) for n=1..15.

Formula

A249514(n)^2 + 7*a(n)^2 = 2^A216515(n)-1.

Crossrefs

Cf. A216515, A249514.

Sequence in context: A071195 A292625 A030274 * A194392 A189571 A055062

Adjacent sequences: A249515 A249516 A249517 * A249519 A249520 A249521

Keyword

nonn

Author

Zak Seidov, Oct 31 2014

Status

approved