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A046952
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Sets record for f(n) = |{(a,b):a*b=n and a|b}|. Also squares of highly composite numbers A002182.
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2
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1, 4, 16, 36, 144, 576, 1296, 2304, 3600, 14400, 32400, 57600, 129600, 518400, 705600, 1587600, 2822400, 6350400, 25401600, 57153600, 101606400, 228614400, 406425600, 635040000, 768398400, 2057529600, 2540160000, 3073593600
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Invented by the HR automatic theory formation program.
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LINKS
| S. Colton, Refactorable Numbers - A Machine Invention, J. Integer Sequences, Vol. 2, 1999, #2.
S. Colton, HR - Automatic Theory Formation in Pure Mathematics
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EXAMPLE
| f(1)=1, (first with 1), f(4)=2 (first with 2), f(16)=3 (first with 3),
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CROSSREFS
| Cf. A002182, A046951.
Sequence in context: A206981 A181795 A136404 * A081456 A130279 A030158
Adjacent sequences: A046949 A046950 A046951 * A046953 A046954 A046955
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KEYWORD
| nice,nonn
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AUTHOR
| Simon Colton (simonco(AT)cs.york.ac.uk)
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