Row 5 of rectangular table A124460.

Terms

a(0) =1a(1) =6a(2) =26a(3) =111a(4) =506a(5) =2437a(6) =12118a(7) =61499a(8) =317485a(9) =1666371a(10) =8891543a(11) =48221602a(12) =265708512a(13) =1486905853a(14) =8446728295a(15) =48690214869a(16) =284692228671