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A002022 In the pile of coconuts problem, the number of coconuts that remain to be shared equally at the end of the process.
(Formerly M4305 N1800)
4

%I M4305 N1800 #31 Jun 16 2023 20:05:05

%S 0,6,240,1020,78120,279930,40353600,134217720,31381059600,99999999990,

%T 34522712143920,106993205379060,51185893014090744,155568095557812210,

%U 98526125335693359360,295147905179352825840,239072435685151324847136

%N In the pile of coconuts problem, the number of coconuts that remain to be shared equally at the end of the process.

%C See A002021 for further description of the problem.

%D N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%H T. D. Noe, <a href="/A002022/b002022.txt">Table of n, a(n) for n = 2..100</a>

%H Anonymous, <a href="http://www.f1compiler.com/samples/Sailors%20Monkey%20Coconuts.f1.html">The Monkey and the Coconuts</a> (with FormulaOne program)

%H Santo D'Agostino, <a href="https://qedinsight.wordpress.com/2011/05/13/the-coconut-problem/">“The Coconut Problem”; Updated With Solution</a>, May 2011.

%H R. S. Underwood and Robert E. Moritz, <a href="http://www.jstor.org/stable/2298601">Problem 3242</a>, Amer. Math. Monthly, 35 (1928), 47-48.

%p f := proc(n) if n mod 2 = 1 then RETURN((n-1)^n-(n-1)) else RETURN((n-1)^(n+1)-(n-1)) fi; end:

%t Rest[Table[If[OddQ[n],(n-1)^n-(n-1),(n-1)^(n+1)-(n-1)],{n,30}]] (* _Harvey P. Dale_, Oct 21 2011 *)

%Y Cf. A002021, A006091.

%K nonn,easy,nice

%O 2,2

%A _N. J. A. Sloane_

%E Formula and more terms from _James A. Sellers_, Feb 10 2000

%E Detail added to the name by _Peter Munn_, Jun 16 2023

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Last modified April 25 12:15 EDT 2024. Contains 371969 sequences. (Running on oeis4.)