Number of increasing mobiles with n elements.

Terms

a(0) =0a(1) =1a(2) =1a(3) =2a(4) =7a(5) =36a(6) =245a(7) =2076a(8) =21059a(9) =248836a(10) =3356609a(11) =50896380a(12) =856958911a(13) =15864014388a(14) =320245960333