71641

Appears in sequences

• Number of permutations p of [n] such that 0p has a nonincreasing jump sequence beginning with two.at n=18A292168
• a(n) = 1*2*3 + 4*5*6 + 7*8*9 + 10*11*12 + 13*14*15 + 16*17*18 + ... + (up to n).at n=30A319014