# A016276 (b-file synthesized from sequence entry) 0 1 1 12 2 103 3 786 4 5713 5 40656 6 286651 7 2012862 8 14109205 9 98822460 10 691932319 11 4844053578 12 33909961177 13 237374494824 14 1661635779907 15 11631493440534 16 81420583092829 17 569944468808148 18 3989612443394215