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A102546
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Numbers t such that t1 is prime and t is a multiple of 10.
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1
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10, 40, 60, 70, 120, 130, 160, 180, 190, 280, 300, 330, 370, 400, 420, 480, 510, 550, 570, 580, 610, 630, 670, 700, 790, 810, 850, 900, 960, 990, 1030, 1050, 1060, 1170, 1180, 1210, 1230, 1240, 1260, 1300, 1390, 1440, 1510, 1540, 1560, 1590, 1600, 1630, 1690, 1740, 1830, 1840, 1870
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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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If t=10, then t1 = 101 (prime).
If t=180, then t1 = 1801 (prime).
If t=420, then t1 = 4201 (prime).
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MATHEMATICA
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Select[10*Range[200], PrimeQ[10#+1]&] (* Harvey P. Dale, Jan 10 2017 *)
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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