Central terms of pendular triangle A118345.

Terms

a(0) =1a(1) =1a(2) =5a(3) =30a(4) =201a(5) =1445a(6) =10900a(7) =85128a(8) =682505a(9) =5585115a(10) =46461437a(11) =391743850a(12) =3340361700a(13) =28755475180a(14) =249572076200