a(n) = n^5 - 31*n + 31, with n*a(n) + n*( n - 1 )*31 = n^6.

Terms

a(0) =1a(1) =1a(2) =181a(3) =931a(4) =3001a(5) =7621a(6) =16621a(7) =32551a(8) =58801a(9) =99721a(10) =160741a(11) =248491a(12) =370921a(13) =537421a(14) =758941a(15) =1048111a(16) =1419361a(17) =1889041a(18) =2475541a(19) =3199411a(20) =4083481a(21) =5152981a(22) =6435661a(23) =7961911a(24) =9764881a(25) =11880601a(26) =14348101a(27) =17209531a(28) =20510281a(29) =24299101