CREATE TABLE table_68717 ("Name" TEXT, "Years" TEXT, "League" TEXT, "FA Cup" TEXT, "League Cup" TEXT, "Europe" TEXT, "Other [C ]" TEXT, "Total" TEXT)

The league of 400 (21) has what years listed?
SELECT "Years" FROM table_68717 WHERE "League" = '400 (21)'
SELECT "Years" FROM "table_68717" WHERE "League" = '400 (21)'