184170domain: NAppears in sequencesa(n) = 1*2*3*4 + 5*6*7*8 + 9*10*11*12 + 13*14*15*16 + 17*18*19*20 + ... + (up to n).at n=22A319205a(n) is the least start of a run of exactly n consecutive integers with an odd number of Fermi-Dirac factors (A064547).at n=12A368407