Row sums of the Riordan matrix (1+x/sqrt(1-4*x),(1-sqrt(1-4*x))/2) (A189175).

A189176

Row sums of the Riordan matrix (1+x/sqrt(1-4*x),(1-sqrt(1-4*x))/2) (A189175).

Terms

    a(0) =1a(1) =2a(2) =5a(3) =15a(4) =49a(5) =168a(6) =594a(7) =2145a(8) =7865a(9) =29172a(10) =109174a(11) =411502a(12) =1560090a(13) =5943200a(14) =22732740a(15) =87253605a(16) =335897865a(17) =1296447900a(18) =5015206350a(19) =19439895090a(20) =75487384830a(21) =293595204240

External references