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A343329
a(n) is the largest positive integer that is abundant and has the same prime signature as A025610(n) or 0 if no such number exists.
0
0, 0, 0, 0, 0, 20, 0, 104, 0, 196, 464, 0, 1372, 1952, 0, 15376, 7232, 17576, 0, 119072, 32128, 476656, 0, 1032256, 130304, 7263392, 0, 8064128, 14776336, 522752, 131096512, 0, 66324736, 458066416, 2087936, 2024096128, 0, 533729792, 16649257024, 8382464, 33759290624, 27027081632, 0
OFFSET
1,6
COMMENTS
a(n) = 0 if A025487(n) is a power of 2 or A025487(n) = 6.
EXAMPLE
a(6) = 20 as A025610(6) = 12 and has prime signature (1, 2) as it is 2^(2) * 3^(1). The largest abundant number with prime signature (1, 2) is 20 = 2^(2) * 5^(1).
CROSSREFS
Sequence in context: A370308 A200430 A084029 * A008426 A055637 A086684
KEYWORD
nonn
AUTHOR
David A. Corneth, Apr 12 2021
STATUS
approved