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A347302
a(n) = 3^n - lcm{1..n}, with a(0) = 0.
3
0, 2, 7, 21, 69, 183, 669, 1767, 5721, 17163, 56529, 149427, 503721, 1233963, 4422609, 13988547, 42326001, 116887923, 375168249, 929468907, 3253991841, 10227560643, 31148267049, 88788949947, 277075307601, 820517465043, 2515094683929, 7545284051787, 22796479021761
OFFSET
0,2
COMMENTS
a(n) >= 0 [Hanson, Th. 1]
REFERENCES
Hanson, Denis. "On the product of the primes." Canadian Mathematical Bulletin 15.1 (1972): 33-37.
Tenenbaum, G. (2015). Introduction to analytic and probabilistic number theory, 3rd ed., American Mathematical Soc. See page 14.
LINKS
MATHEMATICA
Join[{0}, Table[3^n-LCM@@Range[n], {n, 30}]] (* Harvey P. Dale, Aug 13 2024 *)
CROSSREFS
Sequence in context: A274203 A330058 A220726 * A127540 A339041 A319852
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Aug 28 2021
STATUS
approved