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A105300
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Primes formed by reverse concatenation of 8 consecutive triangular numbers.
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0
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OFFSET
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1,1
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LINKS
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EXAMPLE
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a(1)=1178111628114761132511175110261087810731 because 1178111628114761132511175110261087810731 is the prime formed by reverse concatenation of 8 consecutive triangular numbers i.e. 10731,10878,11026,11175,11325,11476,11628 and 11781.
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MATHEMATICA
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Select[FromDigits[Flatten[(IntegerDigits/@Reverse[#])]]&/@Partition[ Accumulate[ Range[ 2000]], 8, 1], PrimeQ] (* Harvey P. Dale, Mar 01 2023 *)
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CROSSREFS
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KEYWORD
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base,nonn,bref
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AUTHOR
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STATUS
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approved
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