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searching for Centered tetrahedral number 1 found (11 total)

alternate case: centered tetrahedral number

1000 (number) (24,094 words) [view diff] exact match in snippet view article

the first non-1 number which is D(D(x)) 1325 = Markov number, centered tetrahedral number 1326 = 51st triangular number, hexagonal number, Mertens function