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Mersenne number fifth power dodecagonal number power of two hexagonal number repunit odd number icosahedral number dodecahedral number pentatope number centered tetrahedral number centered octahedral number centered dodecahedral number centered icosahedral number centered nonagonal number centered decagonal number centered octagonal number dimensionless unit centered pentachoric number power of 10 square triangular number square pyramidal number centered triangular number centered pentagonal number centered cube number centered hexagonal number centered square number hexagonal pyramidal number natural number unit automorphic number triangular number star number octagonal number nonagonal number pentagonal pyramidal number harshad number seventh power stella octangula number Fibonacci number square number heptagonal pyramidal number numeral decagonal number pentagonal number multiplicative identity fourth power cube centered heptagonal number heptagonal number tetrahedral number