EntityQ190890· pop 16· linked from 228 articlescentered triangular numberSign in to savecentered figurate number that represents a triangle with a dot in the center and all other dots surrounding the center in successive triangular layersConnectionsfigurate numberEntitycentered polygonal numberEntityInternational Standard Book NumberEntity19Entity31EntitydimensionEntity46Entityequilateral triangleEntity64Entitythree-dimensional spaceEntity85Entity109Entitysquare numberEntitymagic squareEntity136Entitytriangular numberEntity199Entity166Entityfour-dimensional spaceEntityOn-Line Encyclopedia of Integer SequencesEntityCategoriesFigurate numbers