Q. If I forgot to count sefiras Haomer on the second night, but during the day I commented to my friend how bad my memory is since already on the very second day I lost it. Now since I did mention that it was the second day, although I didn’t have any intention to be yoitzeh (comply), can I still continue to count with a brocho?
A. Yabia Haomer (4: 43), Zichron Yehuda (146) and others maintain that even just writing during the day in a letter or document the date of the sefira suffices, since this mitzva is only Rabbinical and one complies without intention. (See also Pischei Teshuva 489: n. 102).
Horav Aharon Miller’s Shlit’a opinion is that he has to mention that this is that day (as in today is the second day) to be yotze.
Rabbi A. Bartfeld as advised by Horav Aharon Miller Shlit’a