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A013898
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a(n) = 21^(5*n + 1).
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1
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21, 85766121, 350277500542221, 1430568690241985328321, 5842587018385982521381124421, 23861715484377209601555171628930521, 97453656071460446110921078004886769746621, 398010574215107679422058885600836061208944572721, 1625515384162495488635310116741260158419511738394408821
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OFFSET
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0,1
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COMMENTS
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a(n) mod 10 == 1 (the least significant decimal digit of each term is 1).
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LINKS
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FORMULA
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MATHEMATICA
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PROG
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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