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A110778
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Copies of 3 and 7 alternately such that every partial concatenation is a prime.
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15
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OFFSET
| 1,1
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EXAMPLE
| 3,37,373,373777,... are all prime.
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CROSSREFS
| Cf. A110774, A110775, A110776, A110777.
A112534 [From Sean A. Irvine (sairvin(AT)xtra.co.nz), Mar 21 2010]
Sequence in context: A049479 A125314 A050393 * A200129 A108297 A135928
Adjacent sequences: A110775 A110776 A110777 * A110779 A110780 A110781
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KEYWORD
| base,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 12 2005
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EXTENSIONS
| More terms from Joshua Zucker, Jan 11 2006
The next term has 480 7's and is too large to include.
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