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A063963
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Numbers n such that n and n+2540 have same number of divisors.
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1
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3, 11, 14, 17, 21, 26, 27, 30, 32, 33, 38, 53, 62, 65, 74, 87, 91, 107, 111, 129, 131, 137, 138, 141, 149, 154, 161, 167, 170, 173, 174, 179, 183, 186, 191, 194, 200, 203, 206, 210, 217, 219, 221, 227, 230, 238, 243, 246, 247, 251, 255, 257, 263, 266, 267, 278
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| Harry J. Smith, Table of n, a(n) for n=1,...,1000
S. Graham, NMBRTHRY archives
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PROG
| (PARI) j=[]; for(n=1, 1000, if(numdiv(n)==numdiv(n+2540), j=concat(j, n))); j
(PARI) { n=0; for (m=1, 10^9, if(numdiv(m)==numdiv(m + 2540), write("b063963.txt", n++, " ", m); if (n==1000, break)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Sep 04 2009]
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CROSSREFS
| Sequence in context: A158790 A176049 A186078 * A101585 A115214 A143029
Adjacent sequences: A063960 A063961 A063962 * A063964 A063965 A063966
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KEYWORD
| easy,nonn
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AUTHOR
| Jason Earls (zevi_35711(AT)yahoo.com), Sep 04 2001
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