G.f.: (1+62*x+570*x^2+1095*x^3+530*x^4+57*x^5+x^6)/(1-x)^7.

Terms

a(0) =1a(1) =69a(2) =1032a(3) =6905a(4) =29573a(5) =95789a(6) =256488a(7) =598417a(8) =1258081a(9) =2438005a(10) =4425312a(11) =7612617a(12) =12521237a(13) =19826717a(14) =30386672a(15) =45270945a(16) =65794081a(17) =93550117a(18) =130449688a(19) =178759449a(20) =241143813a(21) =320709005a(22) =421049432a(23) =546296369a(24) =701168961