There are presumably earlier terms in the sequence, but the reference does not give them.
Larrion, F.; Pizana, M. A.; and Villarroel-Flores, R.; The clique operator on matching and chessboard graphs. Discrete Math. 309 (2009), no. 1, 85-93.
Table of n, a(n) for n=7..10.
Sequence in context: A268119 A202406 A202399 * A222341 A241270 A135192
Adjacent sequences: A201464 A201465 A201466 * A201468 A201469 A201470
N. J. A. Sloane, Dec 01 2011