[seqfan] Re: On A072000

[Robert Munafo]

No (of course) because pi() was just defined and if it says Pi then the
definition is pointless.

Also, note that
https://oeis.org/wiki/Style_Sheet says:

Pi for 3.141592653... (not pi) [...]

On Sat, Apr 20, 2024 at 06:28 zak seidov via SeqFan <seqfan at list.seqfan.eu>
wrote:

> Dear seqfans,In A072000, there are two formulas:


> FORMULA
> Let pi(x) denote the number of primes <= x (cf. A000720). Then 2*a(n) =
> Sum_{ primes p <= n/2 } Pi(n/p) + Pi(sqrt(n)). [Landau, p. 211]
> Let pi(x) denote the number of primes <= x (cf. A000720). Then a(n) =
> Sum_{i=1..Pi(sqrt(n))} (Pi(n/prime(i)) - i + 1). - Robert G. Wilson v, Feb
> 07 2006


> In both cases we see pi and Pi, is it OK?Thanks
>
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