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A228721 Decimal expansion of 7*Pi. 3
2, 1, 9, 9, 1, 1, 4, 8, 5, 7, 5, 1, 2, 8, 5, 5, 2, 6, 6, 9, 2, 3, 8, 5, 0, 3, 6, 8, 2, 9, 5, 6, 5, 2, 0, 1, 8, 9, 3, 8, 0, 1, 8, 5, 7, 9, 5, 6, 2, 5, 7, 4, 0, 7, 4, 6, 8, 2, 4, 6, 1, 2, 1, 4, 6, 1, 5, 4, 7, 1, 4, 8, 4, 4, 0, 0, 3, 4, 6, 2, 9, 9, 0, 3, 9, 6, 2, 4, 3, 7, 7, 7, 3, 9, 4, 8, 1, 9, 4, 7, 5, 8, 7, 5 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

2,1

COMMENTS

7*Pi is also the surface area of a sphere whose diameter equals the square root of 7. More generally x*Pi is also the surface area of a sphere whose diameter equals the square root of x. - Omar E. Pol, Dec 22 2013

LINKS

Table of n, a(n) for n=2..105.

EXAMPLE

21.99114857512855266923850368295652018938...

MATHEMATICA

RealDigits[7*Pi, 10, 120][[1]] (* Harvey P. Dale, Jan 14 2015 *)

CROSSREFS

Cf. A000796, A019692, A122952, A019694, A019669, A228719 (Pi through 6*Pi).

Sequence in context: A198106 A243261 A230358 * A108290 A308804 A108291

Adjacent sequences:  A228718 A228719 A228720 * A228722 A228723 A228724

KEYWORD

nonn,cons

AUTHOR

Omar E. Pol, Oct 03 2013

STATUS

approved

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Last modified February 23 16:00 EST 2020. Contains 332171 sequences. (Running on oeis4.)