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A068172
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Define an increasing sequence as follows. Given the first term called the seed (the seed need not have the property of the sequence.). Subsequent terms are defined as obtained by inserting/placing digits (at least one) in the previous term to obtain the smallest number with a given property. This is the growing prime sequence for the seed a(1) = 7.
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2
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7, 17, 107, 1087, 10487, 104087, 1024087, 10024087, 100024087, 1000124087, 10001240087, 100012400837, 1000124008327, 10000124008327, 100001124008327, 1000011224008327, 10000110224008327, 100001100224008327, 1000010100224008327, 10000101002240083271, 100001010022400283271, 1000010100221400283271
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| The primes obtained by inserting/placing a digit in a(2) = 17 are 107,127, 137, etc...a(3)= 107 is the smallest.
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CROSSREFS
| Cf. A068166, A068167, A068169, A068170, A068171.
Sequence in context: A082738 A092340 A181605 * A067185 A063384 A165246
Adjacent sequences: A068169 A068170 A068171 * A068173 A068174 A068175
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KEYWORD
| base,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Feb 25 2002
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EXTENSIONS
| More terms from Robert Gerbicz (gerbicz(AT)freemail.hu), Sep 06 2002
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