a(n) is the number of associate Rota-Baxter words in one idempotent generator x and one idempotent operator P of degree n. Such words are Rota-Baxter words that begin and/or end with x, and P is applied n times in the word.
A181282
a(n) is the number of associate Rota-Baxter words in one idempotent generator x and one idempotent operator P of degree n. Such words are Rota-Baxter words that begin and/or end with x, and P is applied n times in the word.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =60a(4) =336a(5) =2016a(6) =12672a(7) =82368a(8) =549120a(9) =3734016a(10) =25798656a(11) =180590592a(12) =1278025728a(13) =9128755200a(14) =65727037440a(15) =476521021440
External references
- oeis: A181282