# A327836 (b-file synthesized from sequence entry) 1 1 2 18 3 64 4 1250 5 3888 6 235298 7 2097152 8 86093442 9 250000000 10 51874849202 11 743008370688 12 46596170244962 13 396857386627072 14 58385852050781250 15 1152921504606846976 16 97322383751333736962 17 273238944967337066496 18 208254700595822483065682 19 5242880000000000000000000