8*P_7(n), 8 times the Legendre Polynomial of order 7 at n.

Terms

a(0) =0a(1) =8a(2) =17593a(3) =389112a(4) =3169562a(5) =15694600a(6) =57385803a(7) =170880248a(8) =438565492a(9) =1005601032a(10) =2110507325a(11) =4124403448a(12) =7599974478a(13) =13331249672a(14) =22425272527a(15) =36386743800a(16) =57216718568a(17) =87526438408a(18) =130667379777a(19) =190878599672a(20) =273452459650a(21) =384919809288a(22) =533255710163