A295823 - OEIS

A295823

Decimal expansion of x > 0 satisfying e + x + e^x*(2x-3) = 0.

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

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OFFSET

0,1

COMMENTS

Consider the following game: A and B are two players, each having exactly one turn.

A goes first. A chooses random numbers (uniformly distributed in [0,1]) and adds them until he stops. If the sum exceeds 1, A loses and B wins.

If the sum of A's numbers does not exceed 1, then B proceeds as A did, choosing random numbers sequentially until the sum of B's numbers exceeds the sum of A's numbers. If the sum of B's numbers exceeds 1, B loses and A wins; otherwise B wins and A loses.

The optimal strategy for A is to stop as soon as the sum exceeds this constant.

LINKS

Table of n, a(n) for n=0..103.

MathStackExchange, An Interesting Two Players' Game Involving Cumulative Sum of Uniform Distribution, Novembre 2016.

EXAMPLE

0.57055652829519647682513101513337478687738690879223085847910287791927497276...

MATHEMATICA

RealDigits[x/.FindRoot[E+x+E^x (-3+2 x)==0, {x, 0.3}, WorkingPrecision-> 120]][[1]]

PROG

(PARI) solve(x=0, 1, exp(1) + x + exp(x)*(2*x-3)) \\ Michel Marcus, Dec 11 2017

CROSSREFS

Sequence in context: A176713 A293506 A011350 * A161018 A197254 A013706