1 + (62/3 - 4613840/350283 Log[2] + 24570945/1868176 Log[3]) et^2 + (9177/64 + 271636085/1401132 Log[2] - 466847955/7472704 Log[3]) et^4 + (76615/128 - 4553279605/2802264 Log[2] + 14144674005/119563264 Log[3] + 914306640625/1076069376 Log[5]) et^6
