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A078261 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). 1
1, 6, 123, 617, 24681, 6170253, 1234050607, 30851265177, 12340506070809, 123405060708091, 123405060708091011, 1542563258851137639, 1234050607080910111213, 61702530354045505560657, 2468101214161820222426283, 308512651770227527803285379, 123405060708091011121314151617 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..17.

PROG

(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

CROSSREFS

Cf. A078258 (similar, with concatenation of 1 to n), A078260 (denominators).

Sequence in context: A296801 A249168 A138572 * A239752 A193223 A132507

Adjacent sequences:  A078258 A078259 A078260 * A078262 A078263 A078264

KEYWORD

base,nonn,changed

AUTHOR

Amarnath Murthy, Nov 24 2002

EXTENSIONS

More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 19 2003

More terms from Michel Marcus, Jan 15 2019

STATUS

approved

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Last modified May 16 05:56 EDT 2022. Contains 353693 sequences. (Running on oeis4.)