3628932

Appears in sequences

• a(n) = 1*2*3*4*5*6*7*8*9*10 + 11*12*13*14*15*16*17*18*19*20 + 21*22*23*24*25*26*27*28*29*30 + ... + (up to n).at n=11A319212
• a(n) = Sum_{d|n} phi(d)*(n/d)! for n > 0, a(0) = 0.at n=10A327030