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A157425
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Numbers which can be represented using fewer symbols than the number of decimal digits in the number.
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0
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120, 125, 128, 216, 243, 256, 343, 512, 625, 720, 729, 1000, 1024, 1089, 1156, 1225, 1296, 1331, 1369, 1444, 1521, 1600, 1681, 1728, 1764, 1849, 1936, 2025, 2048, 2116, 2187, 2197, 2209, 2304, 2401, 2500, 2601, 2704, 2744, 2809, 2916, 3025, 3125, 3136
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| The "up-arrow" symbol is free, since that is indicated by a superscript.
Additional terms are possible if the double factorial (!!) operator is permitted. [From Sean A. Irvine (sairvin(AT)xtra.co.nz), Mar 14 2010]
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EXAMPLE
| 120=5!, 125=5^3, ..., 59050 = 9^5 + 1, ..., 1354984 = 9^6 + 7^7, ...
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CROSSREFS
| Sequence in context: A056456 A085218 A117645 * A030501 A074302 A054573
Adjacent sequences: A157422 A157423 A157424 * A157426 A157427 A157428
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KEYWORD
| base,nonn
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AUTHOR
| Alan Frank (alan(AT)matchups.com), Feb 28 2009
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EXTENSIONS
| Edited by N. J. A. Sloane, Mar 27 2009
Corrected and extended by Sean A. Irvine (sairvin(AT)xtra.co.nz), Mar 14 2010
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