0,3
John H. Conway and R. K. Guy, The Book of Numbers, Copernicus Press, p. 205 of first edition.
Table of n, a(n) for n=0..12.
Sequence in context: A005126 A054151 A018176 * A089259 A221944 A026713
Adjacent sequences: A135457 A135458 A135459 * A135461 A135462 A135463
dead
approved