1,2

P. De Geest, World!Of Numbers

a(n)= 111 so 111 = 1+2+3+4+5+6+7+8+9+11+22+33.

Cf. A002113, A046486, A046487.

Sequence in context: A101574 A082980 A157536 this_sequence A074880 A115647 A019437

Adjacent sequences: A046485 A046486 A046487 this_sequence A046489 A046490 A046491

nonn,hard

Patrick De Geest (pdg(AT)worldofnumbers.com), Sep 15 1998.