%I #10 Aug 06 2024 01:55:23
%S 3,4,6,8,10,11,14,17,30,41,43,50,60,88,145,276,322,374,823,1152
%N Nonparametric solutions to problem in A027669: n such that for some m, the sum of the first m n-gonal numbers is again an n-gonal number.
%F The parametric solution: if n=2 mod 3, the sum of the first (n^2-4*n-2)/3 n-gonal numbers is the ((n^3-6*n^2+3*n+19)/9)-th n-gonal number.
%Y Cf. A027669.
%K nonn,more
%O 0,1
%A Masanobu Kaneko (mkaneko(AT)math.kyushu-u.ac.jp)
%E More terms from Masanobu Kaneko (mkaneko(AT)math.kyushu-u.ac.jp), Jan 05 1998