a(n) = [x^n] Product_{k=1..n} (1 + x^k)^binomial(n,k).
A383073
a(n) = [x^n] Product_{k=1..n} (1 + x^k)^binomial(n,k).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =11a(4) =69a(5) =552a(6) =5133a(7) =53804a(8) =626440a(9) =7979043a(10) =110074741a(11) =1631532542a(12) =25813521836a(13) =433619035254
External references
- oeis: A383073