A339583 Leading term in row 2*n of A237270.

3, 7, 12, 15, 9, 28, 12, 31, 39, 42, 18, 60, 21, 56, 72, 63, 27, 91, 30, 90, 96, 42, 36, 124, 39, 49, 120, 120, 45, 168, 48, 127, 144, 63, 54, 195, 57, 70, 84, 186, 63, 224, 66, 180, 234, 84, 72, 252, 75, 217, 108, 210, 81, 280, 84, 248, 120, 105, 90, 360, 93, 112, 312, 255, 99, 336

Offset: 1

Author

N. J. A. Sloane, Dec 25 2020

Keywords

• nonn

Comments

The leading term in row 2*n-1 is n.

The first column in A237270, [1, 3, 2, 7, 3, 12, 4, 15, 5, 9, 6, 28, 7, 12, 8, 31, 9, 39, 10, 42, 11, ...], without the initial 1, is A237270(A237590(n)+1). By bisecting this we get the present sequence.

Bisection of A241838. - Omar E. Pol, Feb 23 2021

Examples

			Row 10 of A237270 is [9, 9], so a(5) = 9 (the first of the two 9's, officially).
		

Links

• N. J. A. Sloane, Table of n, a(n) for n = 1..2495

Crossrefs

Cf. A237270, A237271, A237590, A237593, A241838.