Triangle, read by rows, where the g.f. of row n equals Product_{k=0..n-1} (1 + (2*k+1)*x + x^2) for n>0 with a single '1' in row 0.
A291845
Triangle, read by rows, where the g.f. of row n equals Product_{k=0..n-1} (1 + (2*k+1)*x + x^2) for n>0 with a single '1' in row 0.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =4a(6) =5a(7) =4a(8) =1a(9) =1a(10) =9a(11) =26a(12) =33a(13) =26a(14) =9a(15) =1a(16) =1a(17) =16a(18) =90a(19) =224a(20) =283a(21) =224a(22) =90a(23) =16a(24) =1a(25) =1a(26) =25a(27) =235a(28) =1050a(29) =2389
External references
- oeis: A291845