[Eric A.] much too affirmative, wrote a few days ago:

No SESN > 10 begins with "1" -- see why? No SESN > 299 begins with "2", etc.

The sequence is finite, thus.

Last term?

... [Michael A. Cleverly] objects that 114 *is* a SESN: 11(4)1(1)4(1)14(1)1(4)114(1) ^^ ^ ^ ^^ !!! So I might be wrong about the finitude of the sequence, sorry. And I'll have to add a few more terms to the seq. in the OEIS... Best, É.