Inverse binomial transform of A003950.

Terms

a(0) =1a(1) =7a(2) =41a(3) =247a(4) =1481a(5) =8887a(6) =53321a(7) =319927a(8) =1919561a(9) =11517367a(10) =69104201a(11) =414625207a(12) =2487751241a(13) =14926507447a(14) =89559044681a(15) =537354268087