%I #14 Dec 18 2018 18:37:56
%S 0,1,50,1307,61513956,1458205461,235845043987769122519632535030
%N a(n) = (A054377(n) - 6)/36.
%H J. Sondow and K. MacMillan, <a href="http://www.jstor.org/stable/10.4169/amer.math.monthly.124.3.232">Primary pseudoperfect numbers, arithmetic progressions, and the Erdős-Moser equation</a>, Amer. Math. Monthly, 124 (2017) 232-240; <a href="http://arxiv.org/abs/1812.06566">arXiv:math/1812.06566 [math.NT]</a>, 2018.
%Y Cf. A054377.
%K nonn,more
%O 2,3
%A _N. J. A. Sloane_, Mar 07 2017