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Tetrahedral numberSquare triangular numberSquare numberHexagonal pyramidPascal's pyramidPolygonal numberAutomorphic numberTriangular bipyramidLegendre's three-square theoremPascal's triangleTetrahedronPerfect powerSum-product numberBell triangleCentered octagonal numberTriangular numberEuclid numberTrapezo-rhombic dodecahedronMagic squareNarayana numberCentered triangular numberPythagorean additionSpiral of theodorusHexadecagonCannonball problemParallelepipedDifference of two squaresPentagonal tilingHeptagonal numberDigit sumTruncated octahedronPrime-counting functionSquarePentagonal numberSquare tilingPalindromic primeCentered hexagonal numberNewton polytopeSquared triangular numberPrime numberFibonacci numberPell numberAlgebraic numberDominoRational numberCardinal numberPolyhedronSuperior highly composite numberSquare-free integerPentatope numberPrime powerRhombicuboctahedronCovering numberRhombohedronSquare matrixGeometric seriesPerfect totient numberSpherical polyhedronPermutohedronCardinalityRhombicosidodecahedronPerfect numberInteger latticeQuadricQuadraticPythagorean trigonometric identityCyclic numberLagrange's four-square theoremDomino tilingCircular primeCube rootInscribed sphereCongruent numberPolygonCyclic quadrilateralPerfect squareSphere packing in a sphereTriangle inequalityInteger triangleDeltahedronCatalan numberMean squareGeometry of numbersTriangular prismPlatonic solidPentakis dodecahedronDivisor functionSum of two squares theoremDyadic rationalMatrix exponentialNatural densityHexagonal tilingSquare antiprismSpherical harmonicsNumber theoryJordan measureSpherical sectorTrapezohedronFractalTangential polygon