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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A152112 Number of increasing initial sequences of bases of order 3. 2
1, 1, 3, 13, 86 (list; graph; refs; listen; history; internal format)
OFFSET

1,3

COMMENTS

Using the terminology of A008932, call a set A a basis of order h if every

number can be written as the sum of h (not necesarily distinct) elements of

A. Call a basis an increasing basis of order h if its elements are arranged

in increasing order, a0<a1<a2<...

Consider the set of all initial subsequences of any length {a0, a1, a2, ..., an}

of all the increasing bases. These can be ordered in lexicographic order,

giving, for h = 3:

0

0,1

0,1,2

0,1,3

0,1,4

CROSSREFS

Cf. A008932, A152111.

Sequence in context: A121679 A023037 A157451 * A188204 A167810 A054420

Adjacent sequences:  A152109 A152110 A152111 * A152113 A152114 A152115

KEYWORD

nonn,more

AUTHOR

David Newman (davidsnewman(AT)gmail.com), Mar 22 2009

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 16 09:56 EST 2012. Contains 205904 sequences.