Sequence Machine (@sequencedb) / X

Pinned

Feb 12, 2022

If a conjecture has value, feel free to submit it to the OEIS! Before submitting: - Verify and try to prove the conjecture - Possibly adjust offsets - Read through the OEIS guidelines oeis.org

Sequence Machine

@sequencedb

May 21, 2023

If you are into bit-twiddling, this one is pretty neat and probably provable: A292531 a(n) = 0 if n is a power of 2. Otherwise, product of 2 numbers nearest n that have more 2's in their prime factorization than n. Is a(n)=and(n²-1, n²) ?

Sequence Machine

@sequencedb

May 21, 2023

So far, the majority of the ~2k posted conjectures are for OEIS entries without a formula field. There are approximately 22k more of this type queued up, but it appears that the bot has been suspended by twitter's new policy... I will resort to some manual postings until fixed.

Sequence Machine

@sequencedb

Apr 28, 2023

Index of prime(n) in A090252. oeis.org/A354148 Is a(n)=comp[A354164(abs(1-n)+1)-1]+1? sequencedb.net/?s=A354148

Sequence Machine

@sequencedb

Apr 28, 2023

Coordination sequence Gal.6.625.4 where G.u.t.v denotes the coordination sequence for a vertex of type v in tiling number t in the Galebach list of u-uniform tilings. oeis.org/A314194 Is a(n)=abs(A008592(n)-A314752(n))? sequencedb.net/?s=A314194