1,1
Table of n, a(n) for n=1..10.
G. Resta, Tridigital Triangular Numbers
a(n) = A000217(A119193(n))
Cf. A000217, A119193. See A119033 for a table of cross-references.
Sequence in context: A119061 A197094 A156379 * A103134 A235534 A300992
Adjacent sequences: A119189 A119190 A119191 * A119193 A119194 A119195
nonn,base,more
Giovanni Resta, May 10 2006
a(10) from Max Alekseyev, May 21 2011
approved