Row sums of number triangle A070895.

Terms

a(0) =1a(1) =2a(2) =4a(3) =9a(4) =22a(5) =59a(6) =170a(7) =525a(8) =1716a(9) =5917a(10) =21362a(11) =80533a(12) =315516a(13) =1281913a(14) =5383622a(15) =23330405a(16) =104084736a(17) =477371217a(18) =2246811730a(19) =10839493637a(20) =53528916508a(21) =270318789249