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A045764
n + 1 - d(n) - phi(n) never takes these values (conjecture).
0
2, 13, 67, 93, 123, 133, 141, 173, 187, 193, 205, 217, 229, 245, 253, 257, 283, 285, 293, 303, 317, 319, 325, 333, 341, 389, 393, 397, 405, 415, 427, 445, 453, 467, 473, 483, 491, 493, 509, 525, 527, 533, 537, 549, 557, 571, 573, 581, 587, 589
OFFSET
1,1
REFERENCES
R. K. Guy, Unsolved Problems in Number Theory, Springer, 3rd ed. (2004), 101.
CROSSREFS
Cf. A045763.
Sequence in context: A037752 A037640 A137967 * A106999 A054566 A038144
KEYWORD
nonn
EXTENSIONS
Added "conjecture" to title. - Wouter Meeussen, Oct 05 2020
STATUS
approved