Tomer Haver

The prime-sandwich property of OEIS A373698

Let a(1) = 1, a(2) = 2, and a(3) = 3. Thereafter choose the least unused positive integer sharing an odd prime factor with the preceding term. I present a computer-assisted proof that every prime p > 3 appears in the consecutive block 3p, p, 2p, a property conjectured in the entr...