6990505domain: NAppears in sequencesGeneralized Jacobsthal numbers.at n=22A084640Sylvester dividends for Jacobsthal numbers.at n=43A105604a(n) = 5*(4^(n+1) - 1)/3.at n=10A146882A generalized Jacobsthal sequence.at n=21A159290Number of steps required by the Hwang-Deutsch merging algorithm.at n=42A260795