

A034683


Unitary abundant numbers (usigma(n)>2n).


24



30, 42, 66, 70, 78, 102, 114, 138, 150, 174, 186, 210, 222, 246, 258, 282, 294, 318, 330, 354, 366, 390, 402, 420, 426, 438, 462, 474, 498, 510, 534, 546, 570, 582, 606, 618, 630, 642, 654, 660, 678, 690, 714, 726, 750, 762, 770, 780, 786, 798, 822, 834
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OFFSET

1,1


COMMENTS

If a term n in the sequence ends in neither 0 nor 5, then 10*n is also in the sequence.  Lekraj Beedassy, Jun 11 2004


REFERENCES

C. Sung, Mathematical Buds, "Unitary Divisors", Chap. V pp. 4267, Ed. H. D. Ruderman, Mu Alpha Theta OK 1978.


LINKS

Nathaniel Johnston, Table of n, a(n) for n = 1..10000


MAPLE

isA034683 := proc(n)
is(A034448(n) > 2*n) ;
end proc:
for n from 1 do
if isA034683(n) then
print(n);
end if;
end do: # R. J. Mathar, Nov 10 2014


CROSSREFS

Cf. A034444, A034448, A129487.
Sequence in context: A053858 A075819 A306217 * A328328 A302574 A087248
Adjacent sequences: A034680 A034681 A034682 * A034684 A034685 A034686


KEYWORD

nonn


AUTHOR

Erich Friedman


STATUS

approved



