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A094333 a(1) = 1, a(n) = least proper multiple of a(n-1) which is a concatenation of successive numbers. Terms with more than one digit must be a concatenation of at least two successive numbers. 3
1, 2, 4, 8, 56, 5152, 17181920, 479839479840, 552587148319552587148320, 370210294386175240152319370210294386175240152320 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
EXAMPLE
a(3) = 4 is the smallest proper multiple of 2 which is a concatenation of a (single) number.
a(5) = 56 and a(6) = 5152 =56*92 is the concatenation of 51 and 52.
CROSSREFS
Sequence in context: A068620 A073953 A206850 * A018473 A004094 A028910
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, May 16 2004
EXTENSIONS
a(7), a(8) from D. S. McNeil, Mar 23 2009
a(9) from Donovan Johnson, Mar 09 2011
a(10) from Paul Tek, Jul 27 2013
STATUS
approved

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Last modified June 19 18:42 EDT 2024. Contains 373507 sequences. (Running on oeis4.)