3160079

Appears in sequences

• a(1) = 1; a(n) > 0; for each k from 1 to n, k divides a(n) or a(n)+1 and a(n) is the least such integer.at n=18A064219
• a(1) = 1; a(n) > 0; for each k from 1 to n, k divides a(n) or a(n)+1 and a(n) is the least such integer.at n=19A064219
• a(1) = 1; a(n) > 0; for each k from 1 to n, k divides a(n) or a(n)+1 and a(n) is the least such integer.at n=20A064219
• a(1) = 1; a(n) > 0; for each k from 1 to n, k divides a(n) or a(n)+1 and a(n) is the least such integer.at n=21A064219
• Numbers n such that sigma(n)/phi(n) = 49/36.at n=14A164650
• a(n) = smallest m such that A187824(m) = n, or -1 if A187824 never takes the value n.at n=22A220890