Triangle, read by rows, of coefficients of q^(nk) in the q-analog of the even double factorials: T(n,k) = [q^(nk)] Product_{j=1..n} (1-q^(2j))/(1-q) for n>0, with T(0,0)=1.
A128596
Triangle, read by rows, of coefficients of q^(nk) in the q-analog of the even double factorials: T(n,k) = [q^(nk)] Product_{j=1..n} (1-q^(2j))/(1-q) for n>0, with T(0,0)=1.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =7a(8) =7a(9) =1a(10) =1a(11) =24a(12) =46a(13) =24a(14) =1a(15) =1a(16) =86a(17) =297a(18) =297a(19) =86a(20) =1a(21) =1a(22) =315a(23) =1919a(24) =3210a(25) =1919a(26) =315a(27) =1a(28) =1a(29) =1170
External references
- oeis: A128596