Almost precisely that! Definitely close enough that anybody who knows the song would get it instantly from that.

It repeats that two or three times, with the final c# leading straight back into the intlitial a# again.

The rest of the song (as we remember it) is more traditional of the '60s period, but that little intermittent melody is a very prominent part of it, to the point that neither of us can recall much (if any) of the rest of the song, and certainly can't think of any lyrics.

There's another possible variation it could be after thinking about it...

The original -

a#, g# f#, f d#, f# g#, c#

The variation -

a#, g# f#, f d#, c# b, c#

Small change, and I think somebody would still get it from the original, but could be the second one also!