Shifts left when Euler transform applied 5 times.

Terms

a(0) =0a(1) =1a(2) =1a(3) =6a(4) =26a(5) =141a(6) =751a(7) =4337a(8) =25512a(9) =154839a(10) =956877a(11) =6014098a(12) =38292603a(13) =246550449a(14) =1602304287a(15) =10497348917a(16) =69253008919a(17) =459673679526