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Search: id:A135164
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OFFSET
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0,1
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COMMENT
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Constants are the prime numbers in decreasing order.
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FORMULA
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a(n)=7^n-5^n+3^n+2^n.
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EXAMPLE
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a(4)=1873 because 7^4=2401, 5^4=625, 3^4=81, 2^4=16 and we can write 2401-625+81+16=1873.
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CROSSREFS
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Cf. A000079, A000244, A000351, A000420, A001047, A074527, A007689, A135158, A135159, A135160.
Sequence in context: A063766 A020040 A125191 this_sequence A072597 A125515 A135920
Adjacent sequences: A135161 A135162 A135163 this_sequence A135165 A135166 A135167
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KEYWORD
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easy,nonn
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Nov 21 2007
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