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A100769 Beginning with 1, least positive integer not occurring earlier such that the n-th partial concatenation is a multiple of n. 4
1, 2, 3, 6, 5, 4, 16, 8, 9, 10, 14, 12, 20, 26, 35, 36, 37, 44, 7, 40, 31, 22, 19, 28, 25, 32, 39, 56, 60, 70, 43, 52, 49, 30, 15, 48, 51, 58, 59, 120, 50, 64, 93, 88, 65, 86, 61, 168, 101, 100, 57, 68, 13, 84, 155, 104, 158, 54, 127, 80, 133, 38, 78, 144, 45, 138, 18, 76 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Paul Tek, Table of n, a(n) for n = 1..10000

Paul Tek, PARI program for this sequence

EXAMPLE

a(7) = 16 as the concatenation 12365416 of first seven terms is a multiple of 7. No number less than 16 and more than 6 fits in.

PROG

(PARI) See Link section.

CROSSREFS

Cf. A099552, A100770.

Sequence in context: A269373 A269374 A137761 * A023889 A327669 A253413

Adjacent sequences:  A100766 A100767 A100768 * A100770 A100771 A100772

KEYWORD

base,easy,nonn

AUTHOR

Amarnath Murthy, Nov 27 2004

EXTENSIONS

More terms from Joshua Zucker, May 27 2005

STATUS

approved

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Last modified June 24 14:24 EDT 2021. Contains 345417 sequences. (Running on oeis4.)