145578domain: NAppears in sequencesNumber of ways to partition 2n+1 into distinct positive integers.at n=43A078408Number of ways to partition 4*n+3 into distinct positive integers.at n=21A078410Mersenne numbers with digits sorted in increasing order and zeros suppressed.at n=19A135374a(n) = Sum_{k=0..n} k!!*(n - k)!!.at n=12A305577