@article{JIS_2007__10_1_a4,
     author = {van de Bult, Fokko J. and Gijswijt, Dion C. and Linderman, John P. and Sloane, N.J.A. and Wilks, Allan R.},
     title = {A slow-growing sequence defined by an unusual recurrence},
     journal = {Journal of integer sequences},
     publisher = {mathdoc},
     volume = {10},
     number = {1},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2007__10_1_a4/}
}