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A133375
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Catalan numbers with digits sorted in increasing order and zeros suppressed.
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0
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1, 1, 2, 5, 14, 24, 123, 249, 134, 2468, 16679, 56788, 1228, 2479, 244467, 4456899, 3355677, 12446799, 3467778, 112366779, 12244566, 222446667, 1234456689, 1333455669, 112234447899
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OFFSET
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0,3
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COMMENTS
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This is to A000108 as A135374 is to A000225 and as A078726 is to A000215. Of the values through a(24), the only primes are the two prime Catalan numbers 2 and 5. What is the first prime in this sequence which is not an untransformed Catalan number?
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LINKS
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FORMULA
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MATHEMATICA
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FromDigits[Sort[IntegerDigits[#]]]&/@CatalanNumber[Range[0, 30]] (* Harvey P. Dale, Feb 26 2015 *)
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CROSSREFS
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KEYWORD
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base,easy,nonn,less
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AUTHOR
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STATUS
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approved
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