Irregular table: n-th row polynomial given by the formal power series expansion of Sum_{k >= 0} (1 + q)^(n*k + k*(k+1)/2)* Product_{j = 1..k} (1 - (1 + q)^j), n >= 1.

A340880

Irregular table: n-th row polynomial given by the formal power series expansion of Sum_{k >= 0} (1 + q)^(n*k + k*(k+1)/2)* Product_{j = 1..k} (1 - (1 + q)^j), n >= 1.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =1a(4) =5a(5) =8a(6) =3a(7) =1a(8) =9a(9) =33a(10) =60a(11) =53a(12) =23a(13) =4a(14) =1a(15) =14a(16) =87a(17) =310a(18) =685a(19) =965a(20) =893a(21) =546a(22) =214a(23) =49a(24) =5a(25) =1a(26) =20a(27) =185a(28) =1040a(29) =3930

External references