# A150644 (b-file synthesized from sequence entry) 0 1 1 2 2 7 3 27 4 118 5 522 6 2420 7 11289 8 53793 9 257362 10 1244961 11 6039808 12 29485738 13 144258235 14 708480043 15 3485227388 16 17187200327 17 84865641756 18 419743432518 19 2078100373296 20 10300559457528 21 51096787670550 22 253687974620399 23 1260301870804674 24 6265125287549723 25 31160154012544656 26 155054753225871295