Number of distinct monomials in the expansion of Product_{i=1..n} (y_1+...+y_i+x_i+x_{i+1}).
A281548
Number of distinct monomials in the expansion of Product_{i=1..n} (y_1+...+y_i+x_i+x_{i+1}).
Terms
- a(0) =1a(1) =3a(2) =11a(3) =46a(4) =210a(5) =1018a(6) =5150a(7) =26889a(8) =143829a(9) =784167a(10) =4341843a(11) =24348352a(12) =138007784a(13) =789375504a(14) =4550522248
External references
- oeis: A281548