# A148364 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 5 4 15 5 47 6 153 7 515 8 1781 9 6290 10 22593 11 82141 12 301643 13 1117894 14 4173685 15 15679942 16 59231389 17 224775911 18 856426691 19 3274980603 20 12562759119 21 48323739885 22 186348608027 23 720198605807 24 2788959419659 25 10819918605211 26 42044943533093 27 163623798367005 28 637635663128808 29 2487921395396235