3 ms·
I think it's the product of the final number and the middle number. (given an odd length sequence)
by alpple 4y ago
I think it's the product of the final number and the middle number. (given an odd length sequence)
- tunesmith 4y agoYeah, that was the irony. I read a paper about reading math carefully, I ignored the intent of the paper entirely and skipped straight to the example, I saw 1+2+3+4+5=3x5, and I told my buddy, "Look, it's the product of the final number and the one that is two before it! So for 435, it's 435 times 433! Isn't that cool?"
- OrderlyTiamat 4y agoAnd it's the final number +1 times the lower of the middle two if it's an even length sequence! So with modulo mapping between even and odd, we can easily construct a \sum that works for any n.