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 A234600 Denominators of the expectation of the process defined by randomly moving 2n balls between bins. 1
 1, 3, 5, 105, 63, 1155, 6435, 45045, 85085, 2909907, 1322685, 111546435, 128707425, 717084225, 9704539845, 4512611027925, 265447707525, 501401225325, 8787716212275, 33393321606645 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Start with two bins, one empty and the other containing 2n balls, n >= 1. Each turn, randomly select a ball and move it from the bin it is in to the other bin. Continue until both bins contain the same number of balls. The numbers in this sequence are the denominators of the rational expressions for the expected number of moves required to end up with the same number of balls in each bin. LINKS PROG (Maxima) E(n) := ( block ( [T, P, S, i, t], T[0] : 1, T[1] : 1, for i : 2 thru n do ( T[i] : T[i-1] - (n+i)*(n-i+1)*T[i-2]/(4*n^2)), P[n] : 1, for i : n - 1 step -1 thru 1 do ( P[i] : (n+i+1)*P[i+1]/(2*n)), S : 0, for i : 1 thru n do ( S : S + P[i]*T[i-1]/T[n]), disp(S) ) )\$ CROSSREFS Cf. A233470 (numerators). Sequence in context: A103081 A338269 A346710 * A003112 A130187 A289488 Adjacent sequences: A234597 A234598 A234599 * A234601 A234602 A234603 KEYWORD nonn,frac AUTHOR Aaron Clark and Stephen Gueble, Apr 19 2014 STATUS approved

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Last modified March 25 20:04 EDT 2023. Contains 361528 sequences. (Running on oeis4.)