With five numbers there are 5 ways to group 4 of them together. If you take the averages of each group of 4 numbers and get...

3428.53425.7533983120.25342.5

What are the 5 numbers?

T=A/n

f(x)=10*[f(x-1)]+x

for x=1...5, leads to 1, 12, 123, 1234, 12345.

How do you define the sequence non-recursively? Can you extract the sequence directly from the averages?

blackjack

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