# A153913 (b-file synthesized from sequence entry) 0 1 1 2 2 26 3 129 4 122 5 239 6 1864 7 1591 8 5085 9 36162 10 47771 11 138927 12 1581118 13 1910444 14 8834202 15 91938135 16 174908406 17 743306687 18 12298725970 19 21309347213 20 143524473375 21 2166989721589 22 5956644162405 23 36651705702510