>>835

   (A_n, C_n)
n=0 (0, 1)
n=1 (3, 5)
n=2 (20, 29)
n=3 (119, 169)
n=4 (696, 985)
n=5 (4059, 5741)
n=6 (23660, 33461)
n=7 (137903, 195025)
n=8 (803760, 1136689)
n=9 (4684659, 6625109)
n=10 (27304196, 38613965)