#OEIS #SLOANE

What a nice coincidence! Neil Sloane uploaded a paper to the arXiv today. The abstract says:

"Someone coming across the sequence 1, 2, 4, 9, 21, 51, 127, . would have had no way (before 1973) of discovering that it had been studied since 1870 (today these are called the Motzkin numbers, and form entry A001006 in the database)."

And I published an entry today on the Motzkin triangle, a refinement of the Motzkin numbers.

https://oeis.org/A359364

https://arxiv.org/abs/2301.03149

Coco Gauff into French Open semi-finals after victory over Sloane Stephens | French Open 2022 | The Guardian #coco #gauff #into #french #open #semi-finals #after #victory #over #sloane #stephens #guardian #1giugno https://parliamodi.news/article/aHR0cHM6Ly93d3cudGhlZ3VhcmRpYW4uY29tL3Nwb3J0LzIwMjIvbWF5LzMxL2NvY28tZ2F1ZmYtaW50by1mcmVuY2gtb3Blbi10ZW5uaXMtc2VtaS1maW5hbHMtYWZ0ZXItdmljdG9yeS1vdmVyLXNsb2FuZS1zdGVwaGVucw==