In 1974, Lambert Gordon Wilson wrote the "book" An Unusual Number Sequence: A Discussion of the Number Sequence 0, 2, 3, 6, 10, 20, 35, 66, 120, 222, 407, 750, 1378. Amazon lists it as currently unavailable.
Unfortunately, any idea as to what the sequence is about is also "unavailable." I have tried to play with it, crack it, etc. with no success. I have entered it into the useful On-Line Encyclopedia of Integer Sequences, which does not recognize it.
So what is so important about this sequence that Wilson would publish a book about it? Any ideas? That is, HELP!