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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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1
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2, 13, 79, 487, 3091, 20143, 133939, 903727, 6161731, 42325903, 292298899, 2026329967, 14085955171, 98111299663, 684331355059, 4778093404207, 33385561441411, 233393582449423, 1632228682334419, 11417969833438447, 79887637214988451, 559022711699743183, 3912205265750868979
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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FORMULA
| a(n)=7^n+5^n+3^n-2^n.
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EXAMPLE
| 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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PROG
| (MAGMA)[7^n+5^n+3^n-2^n: n in [0..50]][From V. Librandi, Dec 15 2010]
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CROSSREFS
| Cf. A000079, A000244, A000351, A000420, A001047, A074527, A007689, A135158, A135159, A135160.
Sequence in context: A090187 A198849 A037555 * A037491 A037571 A179237
Adjacent sequences: A135164 A135165 A135166 * A135168 A135169 A135170
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KEYWORD
| easy,nonn
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AUTHOR
| Omar E. Pol (info(AT)polprimos.com), Nov 21 2007
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EXTENSIONS
| More terms from Vincenzo Librandi, Dec 15 2010
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