A177156 Decimal expansion of (9+sqrt(221))/14.

1, 7, 0, 4, 7, 1, 9, 1, 9, 6, 2, 3, 7, 0, 3, 6, 1, 0, 8, 7, 5, 8, 0, 0, 0, 5, 8, 6, 7, 0, 9, 3, 8, 5, 4, 7, 5, 1, 0, 3, 4, 9, 8, 9, 6, 5, 2, 6, 5, 7, 7, 5, 8, 2, 5, 7, 5, 4, 5, 0, 6, 7, 7, 2, 1, 6, 0, 8, 4, 5, 5, 2, 2, 4, 8, 4, 3, 6, 9, 1, 1, 8, 4, 7, 2, 5, 5, 9, 7, 4, 7, 1, 6, 2, 4, 2, 5, 7, 9, 2, 9, 0, 8, 8, 7

Offset

1,2

Comments

Continued fraction expansion of (9+sqrt(221))/14 is A130658.

Links

Table of n, a(n) for n=1..105.

Index entries for algebraic numbers, degree 2.

Formula

Minimal polynomial: 7*x^2 - 9*x - 5. - Amiram Eldar, Apr 27 2026

Example

1.70471919623703610875800058670938547510349896526577...

Mathematica

RealDigits[(9+Sqrt[221])/14, 10, 120][[1]] (* Harvey P. Dale, Jan 12 2022 *)

Crossrefs

Cf. A177157 (decimal expansion of sqrt(221)), A130658 (repeat 1, 1, 2, 2).

Sequence in context: A324997 A011392 A374776 * A016582 A244662 A060708

Adjacent sequences: A177153 A177154 A177155 * A177157 A177158 A177159

Keyword

cons,nonn

Author

Klaus Brockhaus, May 03 2010

Status

approved