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A074108 Smallest number such that the concatenation of first n terms is a proper multiple of the concatenation of first n natural numbers. 0
2, 4, 6, 8, 13585, 81504, 959339, 3715372, 78137091, 2037878170, 861472331456, 35628332614704, 2509243979641006, 97463093398309010, 52748900893862397840, 7355609995400651988940, 1755796374216684779591144, 71520859355651043708177774 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
EXAMPLE
24 = 8*12, 246 = 2*123, 2468= 2*1234, 246813585 = 19993*12345 and 246813585 is a concatenation of first five terms.
CROSSREFS
Sequence in context: A030149 A083146 A306091 * A231408 A361973 A021409
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Aug 26 2002
EXTENSIONS
Corrected and extended by Max Alekseyev, May 11 2009
STATUS
approved

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Last modified June 12 14:10 EDT 2024. Contains 373331 sequences. (Running on oeis4.)