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A348743
Odd nonsquares k for which A161942(k) > k, where A161942 is the odd part of sigma.
2
2205, 19845, 108045, 143325, 178605, 187425, 236925, 266805, 319725, 353925, 372645, 407925, 452025, 462825, 584325, 637245, 646425, 658125, 672525, 789525, 796005, 804825, 845325, 920205, 972405, 981225, 1007325, 1055925, 1069425, 1102725, 1113525, 1116225, 1166445, 1201725, 1245825, 1289925, 1378125, 1380825, 1442925
OFFSET
1,1
COMMENTS
Not all terms are multiples of 5. For example, 6243237 and 8164233 are not.
PROG
(PARI)
A000265(n) = (n >> valuation(n, 2));
isA348743(n) = ((n%2)&&!issquare(n)&&A000265(sigma(n))>n);
CROSSREFS
Intersection of A088828 and A348742.
Sequence in context: A075455 A233444 A125015 * A252397 A252392 A175915
KEYWORD
nonn
AUTHOR
Antti Karttunen, Nov 02 2021
STATUS
approved