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# User:Alonso del Arte

Here is one of my projects: IMSLP Orchestra to do world premiere recording of Symphony by Franz Asplmayr.

I graduated from Wayne State University with a bachelor's degree in Film Studies in 2008. In 2004, I wrote for WSU's student newspaper, The South End, an article on the celebration for the 100,000th sequence to be added to the OEIS, A100000.

 Sequence of the Day

## Sequence of the Day for September 21

A115020: Count backwards from 100 in steps of 7.

{ 100, 93, 86, 79, 72, 65, 58, 51, 44, 37, 30, 23, 16, 9, 2 }

This sequence is sometimes used to gauge the concentration ability of a patient with Alzheimer’s disease. The arithmetic is simple, but if short-term memory and concentration are compromised, a mistake is likely to occur at some point. Other decrements can be used for this purpose, with the alternative step preferably having no factor in common with 100.

Today is Alzheimer’s Awareness Day.

• A239797 Decimal expansion of ${\frac {\sqrt {3}}{\sqrt[{3}]{4}}}$ .
• A238271 Decimal expansion of $\sum _{n=1}^{\infty }{\frac {\mu (n)}{3^{n}}}$ .
• A237042 UPC check digits.
• A236603 Lowest canonical Gray cycles of length $2n$ .
• A235365 Smallest odd prime factor of $3^{n}+1$ .
• A234522 Decimal expansion of ${\sqrt[{4}]{7}}-{\sqrt[{4}]{5}}$ .
• A233748 Number of graphs on n vertices with edges colored with at most four interchangeable colors under the symmetries of the full edge permutation group.
• A232499 Number of unit squares, aligned with a Cartesian grid, completely within the first quadrant of a circle centered at the origin ordered by increasing radius.
• A231963 Concatenate $n$ with its UPC check digit.
• A230624 Numbers $n$ with property that for every base $b\geq 2$ , there is a number $m$ such that $m+s(m)=n$ , where $s(m)$ is the sum of digits in the base $b$ expansion of $m$ .

## Sequences in the News

• Dec 25 2018 German Heise-News "integers, please" column explains A003173 and OEIS.
• Feb 01 2018 Alphabet announced a $8,589,869,056 =$A000396(6) stock buyback.
• Jan 03 2018 Largest known term of A000043 announced: 77232917.
• Nov 18 2016 PrimeGrid proves that 10223 is not a Sierpinski number, since 10223 × 2 31172165 + 1 is prime. So no changes to A076336 for now.
• Sep 14 2016 Tom Greer discovers the twin primes 2996863034895 × 2 1290000 ± 1 using PrimeGrid, TwinGen and LLR.
• Jan 19 2016 Largest known term of A000043 announced: 74207281, also discovered by Curtis Cooper.