A112232 Repeat each composite number in the sequence of natural numbers.

1, 2, 3, 4, 4, 5, 6, 6, 7, 8, 8, 9, 9, 10, 10, 11, 12, 12, 13, 14, 14, 15, 15, 16, 16, 17, 18, 18, 19, 20, 20, 21, 21, 22, 22, 23, 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 30, 30, 31, 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 38, 38, 39, 39, 40, 40, 41, 42, 42, 43, 44, 44, 45

Offset: 1

Author

Reinhard Zumkeller, Aug 29 2005

Keywords

• nonn

Comments

a(n) = A112233(n) - A112231(n);

a(n + A002808(n) - 1) = A002808(n),

a(n + A002808(n)) = A002808(n),

a(n + A002808(n) + 1) = A002808(n) + 1.