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Search: id:A105302
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| A105302 |
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Primes formed by reverse concatenation of 6 consecutive triangular numbers. |
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+0
1
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| 665545362821, 496465435406378351, 946903861820780741, 112810811035990946903, 195318911830177017111653, 382837413655357034863403, 133661320313041128801272012561
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OFFSET
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1,1
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EXAMPLE
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a(1)=665545362821 because 665545362821 is the prime formed by reverse concatenation of 6 consecutive triangular numbers i.e. 21,28,36,45,55 and 66.
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CROSSREFS
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Sequence in context: A082411 A113952 A104303 this_sequence A015421 A092382 A017411
Adjacent sequences: A105299 A105300 A105301 this_sequence A105303 A105304 A105305
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KEYWORD
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base,nonn
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AUTHOR
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Shyam Sunder Gupta (guptass(AT)rediffmail.com), Apr 25 2005
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