119712domain: NAppears in sequencesNumbers n such that 7*3^n + 2 is prime.at n=18A058603Number of connected induced (non-null) subgraphs of the web graph with 3n nodes.at n=6A286187Expansion of e.g.f. ( (1/x) * Series_Reversion( x*(1 - x*(exp(x) - 1))^3 ) )^(2/3).at n=6A376383