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Search: id:A089766
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| A089766 |
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Smallest prime obtained as k*n! concatenated with a 1 for some k. |
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+0
1
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| 11, 11, 41, 61, 241, 1201, 14401, 100801, 5241601, 10886401, 72576001, 2395008001, 14370048001, 124540416001, 9589612032001, 143844180480001, 2719962685440001, 53353114214400001, 832308581744640001
(list; graph; listen)
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OFFSET
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0,1
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EXAMPLE
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a(7) = 100801 is a prime obtained as 2*7! = 2*5040 = 10080 followed by a 1.
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MAPLE
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for n from 0 to 20 do for k from 1 do m:=10*k*n!+1 :if isprime(m) then printf("%d, ", m): break fi od od: (C. Ronaldo)
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CROSSREFS
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Sequence in context: A022345 A070849 A124297 this_sequence A077699 A003876 A014461
Adjacent sequences: A089763 A089764 A089765 this_sequence A089767 A089768 A089769
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KEYWORD
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base,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 23 2003
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EXTENSIONS
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More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Dec 26 2004
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