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Search: id:A105993
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A105993 Near repunit semiprimes. +0
1
115, 118, 119, 121, 141, 161, 411, 511, 611, 1011, 1101, 1114, 1115, 1119, 1121, 1141, 1191, 1211, 1411, 1711, 5111, 7111, 9111, 11101, 11114, 11141, 11181, 11611, 11911, 13111, 14111, 17111, 18111, 19111, 31111, 61111, 91111, 110111, 111011, 111101 (list; graph; listen)
OFFSET

1,1

EXAMPLE

a(2)=118 is a term because 118 is a semiprime and all digits are 1 except one.

CROSSREFS

Adjacent sequences: A105990 A105991 A105992 this_sequence A105994 A105995 A105996

Sequence in context: A131603 A129823 A056035 this_sequence A036269 A036462 A020443

KEYWORD

base,nonn

AUTHOR

Shyam Sunder Gupta (guptass(AT)rediffmail.com), Apr 29 2005

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Last modified May 16 01:24 EDT 2008. Contains 139630 sequences.


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