# A005154 (b-file synthesized from sequence entry) 0 1 1 2 2 10 3 268 4 195472 5 104310534400 6 29722161121961969778688 7 2413441860555924454205324333893477339897004032 8 15913289476042091181119569948276231488639535067163704670852319029791565485433738366445158400