After the 3rd term, the next term is roughly 100 times the previous term.
Table of n, a(n) for n=1..9.
prime(n) = n-th prime number.
5,7,13,19,31 are upper bounds of twin prime pairs with lower bounds <= prime(10^1). These add up to 75, the first entry in the table.
Sequence in context: A075913 A134228 A324452 * A207546 A207552 A207313
Adjacent sequences: A110899 A110900 A110901 * A110903 A110904 A110905
Cino Hilliard, Sep 21 2005