OFFSET
1,1
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
LINKS
N. J. A. Sloane, Table of n, a(n) for n = 1..2495
EXAMPLE
Row 10 of A237270 is [9, 9], so a(5) = 9 (the first of the two 9's, officially).
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Dec 25 2020
STATUS
approved