1,1
Next term exceeds 1.4*10^17.
Table of n, a(n) for n=1..9.
G. Resta, Tridigital Triangular Numbers
Cf. A000217, A119067. See A119034 for a table of cross-references.
Sequence in context: A195189 A119060 A119050 * A068379 A136280 A123831
Adjacent sequences: A119065 A119066 A119067 * A119069 A119070 A119071
nonn,base,more
Giovanni Resta, May 10 2006
One more term from Max Alekseyev, Mar 09 2009
approved