1,2

Below n=100, 30 values arise and if high enough are divisible by large primorials. E.g. for n=1,..30 Mod[a(n),510510]= {1,6,42,210,3990,43890,339570,157080,196350,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}

Cf. A000203, A002110, A054640, A054641.

Sequence in context: A082986 A062136 A047663 this_sequence A082139 A054613 A141834

Adjacent sequences: A054639 A054640 A054641 this_sequence A054643 A054644 A054645

nonn

Labos E. (labos(AT)ana.sote.hu), May 15 2000