G.f.: limit of the ratio of the g.f.s of adjacent rows in triangle A152805.
A152807
G.f.: limit of the ratio of the g.f.s of adjacent rows in triangle A152805.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =16a(4) =72a(5) =340a(6) =1688a(7) =8648a(8) =45468a(9) =243832a(10) =1328800a(11) =7337500a(12) =40965984a(13) =230864496a(14) =1311526532a(15) =7502799104a(16) =43183861352a(17) =249897858164
External references
- oeis: A152807