Parity of p(p+1)/2 for nth prime p

[JEREMY GARDINER]

The following sequences (allowing offset of first term) all appear to have the same parity:

A034953 Triangular numbers with prime indices
A054269 Length of period of continued fraction for sqrt(p), p prime
A082749 Difference between the sum of next prime(n) natural numbers and the sum of next n primes
A006254 Numbers n such that 2n-1 is prime
A067076 2n+3 is a prime

Jeremy Gardiner
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://list.seqfan.eu/pipermail/seqfan/attachments/20040910/8aaa92d5/attachment-0001.htm>