A084651 Engel expansion for cos(1).
2, 13, 21, 198, 595, 793, 1774, 85505, 1125339, 31105498, 52395920, 58911095, 70815266, 137411174, 285246559, 641084601, 1269499901, 60923201300, 181605462455, 292802733746, 980702252022, 2825619545276, 6954435355458
Offset: 0