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A293891
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Number of sets of nonempty words with a total of n letters over denary alphabet containing the tenth letter such that within each prefix of a word every letter of the alphabet is at least as frequent as the subsequent alphabet letter.
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2
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1, 11, 121, 992, 7948, 57368, 407495, 2762306, 18558261, 121903562, 797628339, 5164110575, 33416303576, 215354872472, 1390196456927, 8971242266557, 58072455010621, 376619368091666, 2452238779936085, 16018094650161058, 105103750467074777, 692390137170794830
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