A334001 The number of odd values in the n-th column of A279212.

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

Offset: 1

Author

Peter Kagey, Apr 12 2020

Keywords

• nonn

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.

Examples

			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.
		

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.)

Crossrefs

Cf. A279212.