Spacings is an option to Grid and related constructs that specifies the spacings to leave between successive objects.
CellMargins is an option for Cell that specifies the absolute margins in printer's points to leave around a cell.
ButterflyGraph[n] gives the order-n butterfly graph. ButterflyGraph[n, b] gives the base-b order-n butterfly graph.
CompleteGraph[n] gives the complete graph with n vertices K_n.CompleteGraph[{n_1, n_2, ..., n_k}] gives the complete k-partite graph with n_1 + n_2 + \[CenterEllipsis] + n_k ...
SQLColumnNames[conn] returns a list of {table, name} pairs for each column in an SQL connection.
HararyGraph[k, n] generates the minimal k-connected graph on n vertices H k, n.
EulerE
(Built-in Mathematica Symbol) EulerE[n] gives the Euler number E_n. EulerE[n, x] gives the Euler polynomial E_n (x).
MatrixPlot[m] generates a plot that gives a visual representation of the values of elements in a matrix.
DirichletCharacter[k, j, n] gives the Dirichlet character \[Chi] {k, j} (n) with modulus k and index j.
RadioButton[x, val] represents a radio button whose setting x is set to val when the button is clicked. RadioButton[x, val] is displayed as RadioButtonBox[0, {0}] when x is ...