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A078290
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Least nontrivial multiple of the n-th prime beginning with 6.
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8
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6, 6, 60, 63, 66, 65, 68, 608, 69, 609, 62, 629, 615, 602, 611, 636, 649, 610, 603, 639, 657, 632, 664, 623, 679, 606, 618, 642, 654, 678, 635, 655, 685, 695, 6109, 604, 628, 652, 668, 692, 6086, 6154, 6112, 6176, 6107, 6169, 633, 669, 681, 687, 699, 6214
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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f[n_] := Block[{k = 2, m = n}, While[ IntegerDigits[k*m][[1]] != 6, k++ ]; k*m]; Table[ f[ Prime[n]], {n, 1, 55}]
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PROG
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(Python)
from sympy import prime
def a(n):
pn = prime(n)
m = 2*pn
while str(m)[0] != '6': m += pn
return m
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CROSSREFS
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KEYWORD
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base,easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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