

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



