Arithmetic mean of first n terms of A008472 is an integer.

Terms

a(0) =2a(1) =13a(2) =134a(3) =167a(4) =2239a(5) =62268a(6) =75255a(7) =135681a(8) =439867a(9) =18139940a(10) =23671044a(11) =40892256a(12) =312083956a(13) =724031017a(14) =1990127567a(15) =2144843867a(16) =2588619526a(17) =7439533243a(18) =15054156002a(19) =54892225873a(20) =69959798320a(21) =79760490898a(22) =282311798922