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1,3
Table of n, a(n) for n=1..20.
H. C. Pocklington, Some Diophantine Impossibilities, Proc. Cambridge Phil. Soc. 17 (1912), pp. 114-116.
Cf. A253200.
Sequence in context: A039041 A079253 A076054 * A139636 A219922 A159559
Adjacent sequences: A253198 A253199 A253200 * A253202 A253203 A253204
nonn,more
Arkadiusz Wesolowski, Mar 21 2015
approved