a(n) = 7*6*5*4*3*2*1 + 14*13*12*11*10*9*8 + ... + (up to the n-th term).

Terms

a(0) =7a(1) =42a(2) =210a(3) =840a(4) =2520a(5) =5040a(6) =5040a(7) =5054a(8) =5222a(9) =7224a(10) =29064a(11) =245280a(12) =2167200a(13) =17302320a(14) =17302341a(15) =17302740a(16) =17310300a(17) =17445960a(18) =19744200a(19) =56372400a(20) =603353520a(21) =603353548a(22) =603354276a(23) =603373176a(24) =603844920a(25) =615147120a(26) =874606320a(27) =6570915120a(28) =6570915155a(29) =6570916310