This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A079274 Number of divisors associated with the cyclic cases within the n-th group of least prime signatures. 1
 1, 0, 3, 4, 14, 18, 65, 82, 253, 378, 953, 1460, 3667, 5480, 12917, 20582, 45130, 71970, 156510, 248020, 524446, 846962, 1733252, 2806484, 5702101, 9186010, 18375867, 29872508, 58760991, 95500008, 186871472, 302966474, 587603027, 956192230 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS FORMULA a(n) = A074141(n) - 2* A074141(n-1) for n > 0 and a(0) = 1 EXAMPLE The number of divisors doubles each time we create a new "matching" partition by appending "1" to a given partition. Therefore we may write ..1..0..3..4..14..18..65..82..253..378..953... + ...2..4.14..36.100.236.602.1368.3242.7240... = 1..2..7.18..50.118.301.684.1621.3620.8193... CROSSREFS Cf. A074141. Sequence in context: A297839 A279938 A280331 * A282421 A282684 A024863 Adjacent sequences:  A079271 A079272 A079273 * A079275 A079276 A079277 KEYWORD easy,nonn AUTHOR Alford Arnold, Feb 06 2003 EXTENSIONS More terms from Pab Ter (pabrlos(AT)yahoo.com), May 27 2004 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 20 03:55 EDT 2019. Contains 327212 sequences. (Running on oeis4.)