a(n) = n^4 + n^3 + n^2 + n + 1.

Terms

a(0) =1a(1) =5a(2) =31a(3) =121a(4) =341a(5) =781a(6) =1555a(7) =2801a(8) =4681a(9) =7381a(10) =11111a(11) =16105a(12) =22621a(13) =30941a(14) =41371a(15) =54241a(16) =69905a(17) =88741a(18) =111151a(19) =137561a(20) =168421a(21) =204205a(22) =245411a(23) =292561a(24) =346201a(25) =406901a(26) =475255a(27) =551881a(28) =637421a(29) =732541