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Results tagged with co.combinatorics
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user 23830
Enumerative combinatorics, graph theory, order theory, posets, matroids, designs and other discrete structures. It also includes algebraic, analytic and probabilistic combinatorics.
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Converting a recursive definition to an explicit one
Is there an explicit form for $a_x$ (whole numbers x) given that $a_x = \displaystyle\sum_{i=1}^{x-1} \binom{x-1}{i} a_i$?
I've listed out the first few terms:
for $x=0,1,2,3,4,5,6, 7$
we have $a_x …
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