I can't tell which of Chai Wah Wu's submissions the interviewer was referring to. https://oeis.org/search?q=Chai%20Wah%20Wu&fmt=short&sort=cre...
You can shorten the candidates list quite a bit: https://oeis.org/search?q=author%3A%22Chai+Wah+Wu%22+2015+Pr...
The article says "Spring 2015" but in fact the magazine was published December 29, 2015. In the text it mentions https://oeis.org/history?seq=A250001 so the interview could not have been earlier than October 2015; Wu's sequence is "recent".
There's a few sequences that jump out, this one, and the prime palindromes of 0's and 1s whose squares are palindromes; but that was August and seems too early.