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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A183420 First of two complementary trees generated by the squares; the other tree is A183421. 3
2, 14, 4, 254, 18, 34, 6, 65534, 270, 398, 22, 1294, 40, 62, 9, 4294967294, 65790, 73982, 286, 159998, 418, 574, 27, 1679614, 1330, 1762, 46, 4094, 70, 119, 12 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Begin with the main tree A183169 generated by the squares:

......................1

......................2

...........4.....................3

.......16.......6...........9..........5

...256...20...36..8......81...12....25...7

Every n>2 is in the subtree from 4 or the subtree from 3.  Therefore, on subtracting 2 from all entries of those subtrees, we obtain complementary trees:  A183420 and A183421.

LINKS

Table of n, a(n) for n=1..31.

FORMULA

See the formulas at A183169 and A183422.

EXAMPLE

First three levels:

..................2

.............14.........4

..........254...18....34...6

CROSSREFS

Cf. A183169, A183420, A183421, A183422, A183231 (analogous trees generated by the triangular numbers).

Sequence in context: A306724 A316909 A103979 * A084677 A191995 A168207

Adjacent sequences:  A183417 A183418 A183419 * A183421 A183422 A183423

KEYWORD

nonn,tabf

AUTHOR

Clark Kimberling, Jan 04 2011

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 23 11:44 EDT 2019. Contains 325254 sequences. (Running on oeis4.)