Matrix 7th power of partition triangle A008284.

Terms

a(0) =1a(1) =7a(2) =1a(3) =28a(4) =7a(5) =1a(6) =105a(7) =35a(8) =7a(9) =1a(10) =322a(11) =133a(12) =35a(13) =7a(14) =1a(15) =952a(16) =455a(17) =140a(18) =35a(19) =7a(20) =1a(21) =2541a(22) =1379a(23) =483a(24) =140a(25) =35a(26) =7a(27) =1a(28) =6539a(29) =3920