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Search: id:A083525
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| A083525 |
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a(1) = 1, a(n) = a(n-1) *n if n is composite, a(n) = a(n-1)+n if n is a prime. |
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+0
2
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| 1, 3, 6, 24, 29, 174, 181, 1448, 13032, 130320, 130331, 1563972, 1563985, 21895790, 328436850, 5254989600, 5254989617, 94589813106, 94589813125, 1891796262500, 39727721512500, 874009873275000, 874009873275023, 20976236958600552
(list; graph; listen)
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OFFSET
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1,2
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MAPLE
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a := proc(n) option remember: if n=1 then RETURN(1) fi: if isprime(n) then RETURN(a(n-1)+n) else RETURN(a(n-1)*n) fi: end: for n from 1 to 50 do printf(`%d, `, a(n)) od:
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CROSSREFS
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Cf. A083524.
Adjacent sequences: A083522 A083523 A083524 this_sequence A083526 A083527 A083528
Sequence in context: A013212 A013218 A101738 this_sequence A106213 A129520 A047167
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KEYWORD
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easy,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 05 2003
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EXTENSIONS
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More terms and Maple code from James A. Sellers (sellersj(AT)math.psu.edu), May 19, 2003
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