1837540

Appears in sequences

• a(1) = 1, a(2) = 4; for n > 2, a(n) = k*a(n-1) + 1 where k is smallest number > 1 such that k*a(n-1) + 1 is a multiple of n.at n=9A069563
• Row sums of triangle in A077526.at n=19A077527