questions on A118960, primes as partitions of 2+1/2

Richard Mathar mathar at
Fri Aug 8 17:05:21 CEST 2008

The only way I can reconcile the values with anything else is to assume
that the "+ 1/2" in the formula is not supposed to be there.  Then, 
the sequence was entered as decimal fractions, with the decimal point
dropped: 1, 1.5, 2.5, ....  This would make it a duplicate of A001750,
except for the initial term and incorrect offset.

Needless to say, this is not consistent with the standards for the OEIS.

Unless someone can provide a better explanation for this sequence, I
would recommend deleting it.

Franklin T. Adams-Watters

-----Original Message-----
From: Richard Mathar <mathar at>

Although marked as "easy", I am failing to understand A118960,|id:A001750
In particular the following questions could be asked:
- how can 2+1/2 (a fraction) be partitioned into primes?
- Doesn't the formula indicate this is a duplicate of  A006254,
  if the offset were corrected?
- Is this an erroneous version of A001750 with a typo at a(0), 1 for 10?

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