Stirling2 triangle with scaled diagonals (powers of 5).

Terms

a(0) =1a(1) =5a(2) =1a(3) =25a(4) =15a(5) =1a(6) =125a(7) =175a(8) =30a(9) =1a(10) =625a(11) =1875a(12) =625a(13) =50a(14) =1a(15) =3125a(16) =19375a(17) =11250a(18) =1625a(19) =75a(20) =1a(21) =15625a(22) =196875a(23) =188125a(24) =43750a(25) =3500a(26) =105a(27) =1a(28) =78125a(29) =1984375