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A103955
a(n) is the least k such that k-n and k are adjacent powerful numbers.
2
9, 27, 4, 8, 32, 214375, 16, 72, 25, 2197, 3136, 512, 49, 30459375, 64, 144, 529, 243, 100, 21316, 1352, 100489, 648, 1024, 169, 11907, 196, 1000, 36992, 6889, 392, 288, 12967201, 899236854961, 324, 900, 117649, 3125, 10648, 2744, 841, 518436000667
OFFSET
1,1
COMMENTS
Sister sequence of a(n)-n is given by A103954.
a(105) > 10^22. - Donovan Johnson, Nov 19 2011
LINKS
CROSSREFS
KEYWORD
nonn
AUTHOR
Max Alekseyev, Feb 22 2005
EXTENSIONS
Offset corrected by Donovan Johnson, Nov 19 2011
STATUS
approved