

A334001


The number of odd values in the nth column of A279212.


2



2, 2, 4, 4, 6, 8, 8, 10, 10, 12, 16, 12, 16, 14, 18, 12, 22, 24, 20, 16, 22, 22, 24, 26, 22, 26, 28, 16, 30, 30, 36, 24, 34, 36, 32, 30, 30, 44, 42, 44, 38, 44, 50, 34, 44, 46, 54, 36, 50, 60, 56, 30, 50, 56, 56, 46, 54, 56, 68, 36, 68, 54, 56, 46, 44, 66, 54
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OFFSET

1,1


COMMENTS

All of the values in this sequence are even, as shown in Alec Jones's proof that each column of A279212 has a finite number of odd entries.
Conjecture: a(n) <= 2*n.


LINKS

Peter Kagey, Table of n, a(n) for n = 1..1024
Alec Jones, Proof that columns of A279212 have finitely many odd entries.
Peter Kagey, Bitmap showing parity of first 1024 rows and 512 columns of A269212. (Odd values are white; even values are black.)


EXAMPLE

For n = 3, the third column of A279212 is 11, 39, 119, 330, 870, 2209, 5454, 13176, 31280, 73200, ... which contains a(3) = 4 odd values.


CROSSREFS

Cf. A279212.
Sequence in context: A218897 A218064 A352227 * A341731 A183002 A211859
Adjacent sequences: A333998 A333999 A334000 * A334002 A334003 A334004


KEYWORD

nonn


AUTHOR

Peter Kagey, Apr 12 2020


STATUS

approved



