login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A007969 Rectangular numbers. 11
2, 5, 6, 10, 12, 13, 14, 17, 18, 20, 21, 22, 26, 28, 29, 30, 33, 34, 37, 38, 39, 41, 42, 44, 45, 46, 50, 52, 53, 54, 55, 56, 57, 58, 60, 61, 62, 65, 66, 68, 69, 70, 72, 73, 74, 76, 77, 78, 82, 84, 85, 86, 89, 90, 92, 93, 94, 95, 97, 98, 101, 102, 105, 106, 108, 109 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

Subsequence of A000037; A007968(a(n))=1; A002144 is a subsequence;

A191854(n) = A007966(a(n)); A191855(n) = A007967(a(n));

a(n) = A191854(n)*A191855(n). [Reinhard Zumkeller, Jun 18 2011]

LINKS

J. H. Conway, On Happy Factorizations, J. Integer Sequences, Vol. 1, 1998, #1.

CROSSREFS

Every number belongs to exactly one of A000290, A007969, A007970.

Sequence in context: A077471 A064572 A032399 * A187902 A187231 A162340

Adjacent sequences:  A007966 A007967 A007968 * A007970 A007971 A007972

KEYWORD

nonn

AUTHOR

J. H. Conway (conway(AT)math.princeton.edu)

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 14 23:53 EST 2012. Contains 205689 sequences.