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A291650 Expansion of Product_{k>=2} (1 + x^Fibonacci(k))^Fibonacci(k). 0

%I #5 Aug 28 2017 17:45:30

%S 1,1,2,5,4,12,14,16,42,35,65,100,84,205,201,254,490,386,749,917,851,

%T 1816,1566,2260,3513,2784,5566,5748,6116,11366,9048,14740,19037,16095,

%U 31576,28505,35218,56334,43671,77512,85163,80577,147756,121016,172408,236022

%N Expansion of Product_{k>=2} (1 + x^Fibonacci(k))^Fibonacci(k).

%C Number of partitions of n into distinct Fibonacci parts (1 counted as single Fibonacci number), where Fibonacci(k) different parts of size Fibonacci(k) are available (1a, 2a, 2b, 3a, 3b, 3c, ...).

%H <a href="/index/Par#part">Index entries for related partition-counting sequences</a>

%F G.f.: Product_{k>=2} (1 + x^A000045(k))^A000045(k).

%e a(3) = 5 because we have [3a], [3b], [3c], [2a, 1a] and [2b, 1a].

%t nmax = 50; CoefficientList[Series[Product[(1 + x^Fibonacci[k])^Fibonacci[k], {k, 2, nmax}], {x, 0, nmax}], x]

%Y Cf. A000045, A000119, A000121, A026007, A166861, A200544, A239002, A260787, A261050.

%K nonn

%O 0,3

%A _Ilya Gutkovskiy_, Aug 28 2017

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Last modified May 4 17:24 EDT 2024. Contains 372257 sequences. (Running on oeis4.)