What is the Nth term of -1 2 7 14 23 34?

According to Wittgenstein's Finite Rule Paradox every finite sequence of numbers can be a described in infinitely many ways and so can be continued any of these ways - some simple, some complicated but all equally valid.
The Nth term, according to the simplest rule (a quadratic), is T(n) = n^2 - 2