# A034256 (b-file synthesized from sequence entry) 0 1 1 4 2 24 3 224 4 2464 5 29568 6 374528 7 4922368 8 66451968 9 915560448 10 12817846272 11 181780365312 12 2605518569472 13 37679807004672 14 549048616353792 15 8052713039855616 16 118777517337870336 17 1760702021714313216