# A076090 (b-file synthesized from sequence entry) 1 1 2 81 3 512 4 2401 5 17210368 6 34012224 7 612220032 8 20047612231936 9 3904305912313344 10 13744803133596058624 11 8007313507497959524352 12 2518170116818978404827136 13 81920000000000000