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 A180058 Smallest number occuring in exactly n rows of Pascal's triangle. 3
 2, 6, 120, 3003 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A059233(a(n)) = n and A059233(m) < n for m < a(n). LINKS Wikipedia, Singmaster's conjecture EXAMPLE .  n  A180058  referred equal binomial coefficients (A007318)  A059233 .  -  -------  ----------------------------------------------  ------- .  1        2   C (2, 1)                                             1 .  2        6   C (4, 2)   C (6, 1)                                  2 .  3      120   C (10, 3)  C (16, 2)  C (120, 1)                     3 .  4     3003   C (14, 6)  C (15, 5)  C (78, 2)   C (3003, 1)        4 . PROG (Haskell) import Data.List (elemIndex) import Data.Maybe (fromJust) a180058 = (+ 2) . fromJust . (`elemIndex` a059233_list) CROSSREFS Cf. A185024, A182237, A098565, A003015, A003016. Sequence in context: A075391 A212158 A058251 * A264470 A039716 A164955 Adjacent sequences:  A180055 A180056 A180057 * A180059 A180060 A180061 KEYWORD nonn,more AUTHOR Reinhard Zumkeller, Dec 24 2012 STATUS approved

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Last modified November 22 15:27 EST 2017. Contains 295089 sequences.