TY - JOUR AU - Maciej Ulas TI - A note on SierpiƄski's problem related to triangular numbers JO - Colloquium Mathematicum PY - 2009 SP - 165 EP - 173 VL - 117 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm117-2-2/ DO - 10.4064/cm117-2-2 LA - en ID - 10_4064_cm117_2_2 ER -