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Search: id:A135167
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| A135167 |
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7^n+5^n+3^n-2^n. Constants are the prime numbers in decreasing order. |
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+0
2
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OFFSET
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0,1
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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)=3091 because 7^4=2401, 5^4=625, 3^4=81, 2^4=16 and we can write 2401+625+81-16=3091.
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CROSSREFS
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Cf. A000079, A000244, A000351, A000420, A001047, A074527, A007689, A135158, A135159, A135160.
Adjacent sequences: A135164 A135165 A135166 this_sequence A135168 A135169 A135170
Sequence in context: A037732 A090187 A037555 this_sequence A037491 A037571 A000179
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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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