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A335231
Numbers that are the sum of 3 refactorable numbers in exactly one way.
1
3, 4, 5, 6, 10, 13, 14, 15, 16, 17, 23, 24, 30, 31, 41, 47, 52, 55, 68, 71, 79, 95, 103, 119, 127, 143, 151, 167, 171, 175, 179, 187, 191, 195, 199, 203, 211, 215, 223, 227, 247, 271, 275, 291, 295, 311, 327, 335, 367, 391, 415, 431, 435, 551, 559, 607, 775, 983, 1031
OFFSET
1,1
LINKS
Eric Weisstein's World of Mathematics, Refactorable Number
EXAMPLE
6 is in the sequence since it is the sum of 3 refactorable numbers in exactly one way, 6 = 2 + 2 + 2.
10 is in the sequence since it is the sum of 3 refactorable numbers in exactly one way, 10 = 1 + 1 + 8.
CROSSREFS
Cf. A000005 (tau), A033950 (refactorable numbers), A335230.
Sequence in context: A219041 A218946 A174057 * A164977 A103033 A099561
KEYWORD
nonn
AUTHOR
Wesley Ivan Hurt, Jun 09 2020
STATUS
approved