1, 5, 11, 19, 29, 41, 55, 71, 89, ...
Searching it on the OEIS (a great resource for mathematics) gave
http://oeis.org/search?q=1%2C5%2C+11%2C+19%2C+29%2C+41%2C+55...
It turns out that these are precisely the first values of the Fibonacci polynomial n^2 - n - 1
I haven't verified this fact, but it seems like it comes from an application of the generating function of the Fibonacci numbers.
I posted my code in another comment
https://news.ycombinator.com/item?id=24933085
1, 5, 11, 19, 29, 41, 55, 71, 89, ...
Searching it on the OEIS (a great resource for mathematics) gave
http://oeis.org/search?q=1%2C5%2C+11%2C+19%2C+29%2C+41%2C+55...
It turns out that these are precisely the first values of the Fibonacci polynomial n^2 - n - 1
I haven't verified this fact, but it seems like it comes from an application of the generating function of the Fibonacci numbers.
I posted my code in another comment
https://news.ycombinator.com/item?id=24933085