The LSSEQ function block has a single dynamo similar to the LSSTD function block dynamo. When you add this dynamo to a picture, the Dynamo Properties dialog prompts you to enter the path to the LSSEQ block. If you prefer to use a custom faceplate rather than the default faceplate, enter its name in the Faceplate display name field. The Dynamo Properties dialog is shown below:

The SEQ_ dynamo from the frsSIS_Theme dynamo set is shown below as it appears in Configure mode. (The descriptions, however, are for the behavior in Run mode.)
The SEQ_ dynamo from the frsSIS dynamo set is the same as the _Theme version except it includes a faceplate button: