[4,17,68,244,777,2221,5853,14488,34057,76495, 164823,341898,685019,1329596,2506729,4601633, 8242778,14435568,24759659,41655972,68838529, 111877953,179018454,282309115,439154169,674416741, 1023247403,1534854222]