A176324 Decimal expansion of (15+7*sqrt(5))/6.

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

Offset: 1

Author

Klaus Brockhaus, Apr 15 2010

Keywords

• nonn
• cons
• easy

Comments

Continued fraction expansion of (15+7*sqrt(5))/6 is A010720.

Volume of a triangular hebesphenorotunda (Johnson solid J_92) with unit edges. - Paolo Xausa, Aug 02 2025

Examples

			5.10874597374975464581...
		

Links

• G. C. Greubel, Table of n, a(n) for n = 1..1000
• Wikipedia, Triangular hebesphenorotunda.

Crossrefs

Cf. A002163 (decimal expansion of sqrt(5)), A010720 (repeat 5, 9).

Programs

Magma

SetDefaultRealField(RealField(100)); (15+7*Sqrt(5))/6; // G. C. Greubel, Dec 05 2019

Maple

evalf( (15+7*sqrt(5))/6, 100); # G. C. Greubel, Dec 05 2019

Mathematica

RealDigits[(15+7Sqrt[5])/6,10,120][[1]]  (* Harvey P. Dale, Apr 18 2011 *)

PARI

default(realprecision, 100); (15+7*sqrt(5))/6 \\ G. C. Greubel, Dec 05 2019

Sage

numerical_approx((15+7*sqrt(5))/6, digits=100) # G. C. Greubel, Dec 05 2019