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A320879
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Primes such that iteration of A062028 (n + its digit sum) yields 7 primes in a row.
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5
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286330897, 10858338851, 12869802851, 15845166851, 29837412851, 45480846799, 56676324799, 56676324863, 68105187851, 73915118861, 114737845853, 129282912851, 154648223809, 155738371853, 207036953861, 271077075851, 358515148853, 373169411809, 373169411861, 395705343799
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OFFSET
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1,1
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COMMENTS
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The first 15 terms are immediately calculated from A320878(1..200) using the formula.
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LINKS
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FORMULA
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PROG
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(PARI) is_A320879(n)=isprime(n=A062028(n))&& is_A320878(n) \\ If possible, use this to select terms from a sufficiently large precomputed array A320878:
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CROSSREFS
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a(1) = A090009(8) = start of first chain of 8 primes under iteration of A062028.
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KEYWORD
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nonn,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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