|
%I #9 Apr 12 2019 18:21:20
%S 1,4,10,4960,428536
%N Numbers that are both centered triangular and tetrahedral.
%C If it exists, a(6) > 10^29. - _Bert Dobbelaere_, Apr 12 2019
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/CenteredTriangularNumber.html">Centered Triangular Number</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/TetrahedralNumber.html">Tetrahedral Number</a>
%Y Intersection of A000292 and A005448.
%Y Cf. A003556, A027568, A128862, A131750, A307492.
%K nonn,more
%O 1,2
%A _Ilya Gutkovskiy_, Apr 10 2019
|
