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A366855 Least number such that the concatenation of the exponents in the prime factorization is n. 0
2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 6, 18, 54, 162, 486, 1458, 4374, 13122, 39366, 1048576, 12, 36, 108, 324, 972, 2916, 8748, 26244, 78732, 1073741824, 24, 72, 216, 648, 1944, 5832, 17496, 52488, 157464, 1099511627776, 48, 144, 432, 1296, 3888, 11664, 34992 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
6 = 2 * 3, the concatenation of the exponents of the prime factors of 6 is 11, and no lesser number verifies this, so a(11) = 6.
CROSSREFS
Sequence in context: A243088 A113699 A113010 * A330127 A292568 A354600
KEYWORD
nonn,base
AUTHOR
Jean-Marc Rebert, Jan 25 2024
STATUS
approved

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Last modified April 12 09:49 EDT 2024. Contains 371627 sequences. (Running on oeis4.)