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A105983
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Near-repdigit semiprimes with 2 as repeated digit.
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1
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122, 202, 221, 226, 262, 422, 622, 922, 2122, 2227, 2229, 2722, 4222, 8222, 20222, 22223, 22226, 22262, 22322, 22522, 22622, 22822, 25222, 32222, 52222, 202222, 222221, 222223, 222242, 222422, 223222, 224222, 226222, 262222, 272222, 622222
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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(2)=202 is a term because 202 is a semiprime and all digits are equal to 2 except one.
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MATHEMATICA
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Rest[Select[FromDigits/@Flatten[Permutations/@Flatten[ Table[PadRight[ {n}, k, 2], {k, 3, 6}, {n, 0, 9}], 1], 1], PrimeOmega[#]==2&]]//Sort (* Harvey P. Dale, Jun 11 2018 *)
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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STATUS
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approved
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