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Vitalik Buterin
@vitalik.eth
TIL the sum of all fibs is the second-next fib minus one. Kinda obvious once you think about it, but still... never seen this mentioned before.
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OPi
@opimedia
Fibonacci numbers: F_0 = 0 F_1 = 1 F_{n+2} = F_n + F_{n+1} Sum of Fibonacci numbers: Ī£_{i=0}^n F_i = F_{n+2} - 1 It's a well-known identity š https://en.wikipedia.org/wiki/Fibonacci_sequence#Combinatorial_proofs There are really a lot of identities for this sequence.
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