Sean Johnson is the allegorical sculptor who tapes couches to gallery walls, turning them into anxious monuments, and he hasn’t had a solo show in a few years. This one is almost entirely new works: Wealth, an enormous pyramid of pennies (about 70,000 of them); Last Seen Nov. 1 2007 and Last Seen Jan. 30 1989, portraits of missing children made of nails on drywall; and what Johnson refers to as “a new balancing piece about the government.” “Balancing” in this case meaning precariousness incarnate. (LxWxH, 6007 12th Ave S, lengthbywidthbyheight.com, 6–9 pm, free, through May 4)