OEIS A229580 mini challenge (RPL)

[Gerson W. Barbosa]

(05-02-2018 05:16 AM)Gerald H Wrote:  My offering:

Code:

37.5

# 3095h

« DUP + 1 - 2 OVER 2 - ^ * CEIL
»

Very nice challenge, Gerson, thank you. I hope you will inform OEIS of your formula.

Thank you, Gerald, but I think there is no problem if you inform them yourself. After all, in order do solve this little problem you’ve managed to derive a formula as well (as have others). I would suggest the formula valid for n > 1, that is, without the ceiling part.

I arrived at that OEIS sequence when testing a continued fraction with consecutive denominators 3, 20 and 112. Since a continued fraction is evaluated backwards, a recursive formula wouldn’t help.

Gerson.