“All the entries after yours were copied from Google searches and the copiers don’t know crap about what they are posting”.
Mechaniker–I didn’t do any Google searching. After trying and failing to find a formula to generate the values in the sequence, I just happened to think of the integer values on each side of the integer in the sequence: 3,4,5 5,6,7 11,12,13 17,18,19 29,30,31 41,42,43 59,60,61 etc,
Each number of the sequence 4,6,12,18,30, 42, 60, has a prime number that is one less than the value in the sequence and a prime number that is one greater than the value in the sequence. Any prime integer except 2 must be odd since even numbers can be divided by 2. I recalled a discussion some years ago in a college mathematics class about twin primes (I’m 70 years old, so it has been a while back) which I found fascinating. I know that number theory covers topics such as twin primes, but I elected to take numerical analysis as opposed to theory of numbers because my schedule would’t allow both courses.