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A156223
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Numbers that are products of distinct terms in A000312.
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0
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1, 4, 27, 108, 256, 1024, 3125, 6912, 12500, 27648, 46656, 84375, 186624, 337500, 800000, 823543, 1259712, 3200000, 3294172, 5038848, 11943936, 16777216, 21600000, 22235661, 47775744, 67108864
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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EXAMPLE
| a(1) = 1 = 1^1
a(2) = 4 = 2^2
a(3) = 108 = 2^2 * 3^3
...
a(20) = 5038848 = 2^2 * 3^3 * 6^6
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MATHEMATICA
| Generating recursion (in Mathematica): p = {1};
For[x = 2, x <= 13, x++, {
p = Flatten@Append[p, p*x^x];
}];
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CROSSREFS
| Sequence in context: A092364 A071175 A063262 * A048102 A171469 A190584
Adjacent sequences: A156220 A156221 A156222 * A156224 A156225 A156226
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KEYWORD
| nonn
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AUTHOR
| Gabriel Benamy (GeicoGecko(AT)GMail.com), Feb 06 2009
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