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A078261
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Smallest integer multiple of the decimal number N = 0.246...up to 2n (decimal point followed by concatenation of 2 through 2n of first n even numbers).
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1
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1, 6, 123, 617, 24681, 6170253, 1234050607, 30851265177, 12340506070809, 123405060708091, 123405060708091011, 1542563258851137639, 1234050607080910111213, 61702530354045505560657, 2468101214161820222426283, 308512651770227527803285379, 123405060708091011121314151617
(list;
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listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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PROG
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(PARI) a(n) = {my(s = ""); for (k=1, n, s = concat(s, Str(2*k))); numerator(eval(s)/10^(#s)); } \\ Michel Marcus, Jan 15 2019
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CROSSREFS
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Cf. A078258 (similar, with concatenation of 1 to n), A078260 (denominators).
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KEYWORD
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base,nonn
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AUTHOR
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EXTENSIONS
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More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 19 2003
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STATUS
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approved
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