真的诶 by dzy2008 @ 2020-08-25 16:51:19
http://oeis.org/search?q=0%2C1%2C2%2C3%2C3%2C5%2C4%2C4%2C5%2C5%2C5%2C5&language=english&go=Search by impuk @ 2020-08-25 16:58:02