Generation Bee

[BMAD]

Every male bee has just a female parent, while every female bee has both a male and a female parent. How many ancestors does a male bee have, counting twenty generations?

Note: Don't count this male as a generation or include him in the 'final tally.'

[Rob_Gandy]

28655 bees. After the 5th generation I realized what was going on.

[BMAD]

28655 bees. After the 5th generation I realized what was going on.

I have you slightly off.

[superprismatic]

17710 Female ancestors and 10945 male ancestors for a total of 28655.

[BMAD]

but I got

28656

[kukupai]

but I got

28656

Do you count "this male bee" too? Because I can't get more than 28655 either.

[witzar]

M(n) = F(n+3) - 2

where M(n) is a number of ancestors of a male bee counting n generations and F(k) stands for k-th Fibonacci number

[MathewStephenKtm]

28656 ancestors!

[BMAD]

28656 ancestors!

I got the same answer but the rest of the board didn't agree with me.

[Thargyi]

28655 bees