Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the
OEIS Foundation home page.
No formula or recurrence is known.
Needs a b-file (A290867 gives first 100 terms).
Table of n, a(n) for n=1..43.
Cf. A290447, A292104.
Column k=2 of triangle in A290867.
Sequence in context: A069983 A005894 A015622 * A290447 A000750 A289389
Adjacent sequences: A292100 A292101 A292102 * A292104 A292105 A292106
N. J. A. Sloane, Sep 14 2017