(Translated by https://www.hiragana.jp/)
# A162868 (b-file synthesized from sequence entry) 0 1 1 2 2 40 3 4680 4 1591200 5 1891936800 6 4270101357600 7 11089453225687200 8 32565776278494961756800 9 28429922691126101613686400 10 42204464874461454985621846571472000