Row sums of triangle A116880 (generalized Catalan C(1,2)).
A116881
Row sums of triangle A116880 (generalized Catalan C(1,2)).
Terms
- a(0) =1a(1) =4a(2) =23a(3) =150a(4) =1037a(5) =7408a(6) =54035a(7) =399850a(8) =2990105a(9) =22540260a(10) =170991647a(11) =1303789534a(12) =9983164453a(13) =76711854040a(14) =591236890667
External references
- oeis: A116881