1,1
Values of n see A037050.
a(5) > 7.5*10^37, if it exists. - Giovanni Resta, Aug 26 2019
Table of n, a(n) for n=1..4.
2664662 = 121 * (122 + 123 + ... + 241 + 242) = 121 * 22022.
Cf. A036659, A037050.
Sequence in context: A272238 A303255 A322096 * A283072 A214599 A071066
Adjacent sequences: A037048 A037049 A037050 * A037052 A037053 A037054
nonn,base,hard,more
Patrick De Geest, Jan 04 1999
approved