Coefficients of period polynomials.

Terms

a(0) =3a(1) =10a(2) =21a(3) =55a(4) =78a(5) =136a(6) =171a(7) =253a(8) =406a(9) =465a(10) =666a(11) =820a(12) =903a(13) =1081a(14) =1378a(15) =1711a(16) =1830a(17) =2211a(18) =2485a(19) =2628a(20) =3081a(21) =3403a(22) =3916a(23) =4656a(24) =5050