Function EXT:MAPCAP. The function EXT:MAPCAP is like MAPCAN, except that it concatenates the resulting lists with APPEND instead of NCONC:

(EXT:MAPCAP function x1 ... xn) ≡
(APPLY #'APPEND (MAPCAR function x1 ... xn))

(Actually a bit more efficient that this would have been.)

Function EXT:MAPLAP. The function EXT:MAPLAP is like MAPCON, except that it concatenates the resulting lists with APPEND instead of NCONC:

(EXT:MAPLAP function x1 ... xn) ≡
(APPLY #'APPEND (MAPLIST function x1 ... xn))

(Actually a bit more efficient that this would have been.)