[0,3,12,45,168,627,2340,8733,32592,121635,453948,
1694157,6322680,23596563,88063572,328657725,
1226567328,4577611587,17083879020,63757904493,
237947738952,888033051315,3314184466308,
12368704813917,46160634789360,172273834343523,
642934702584732,2399464975995405,8954925201396888,
33420235829592147]
|