Triangular array read by rows. The n-th row is the expansion of (1+x)(1+2x+4x^2)...(1+nx+(nx)^2+(nx)^3+...(nx)^n).
A185588
Triangular array read by rows. The n-th row is the expansion of (1+x)(1+2x+4x^2)...(1+nx+(nx)^2+(nx)^3+...(nx)^n).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =6a(6) =4a(7) =1a(8) =6a(9) =24a(10) =76a(11) =147a(12) =198a(13) =108a(14) =1a(15) =10a(16) =64a(17) =332a(18) =1475a(19) =5074a(20) =14260a(21) =32464a(22) =52032a(23) =57600a(24) =27648a(25) =1a(26) =15a(27) =139a(28) =1027a(29) =6610
External references
- oeis: A185588