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A224421
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The indices of tetrahedral numbers that are also triangular.
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2
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OFFSET
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0,3
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LINKS
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EXAMPLE
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The eighth tetrahedral number is 120, which is also a triangular number. Hence, 8 belongs to the sequence.
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PROG
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CROSSREFS
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KEYWORD
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nonn,full,fini
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AUTHOR
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STATUS
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approved
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