A081331 Number of numbers <= n that can be written as sum of two 3-smooth numbers.

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 43, 43, 44, 45, 46, 47, 48, 48, 49, 50, 51, 52, 53, 54, 55, 55, 56, 57, 58, 59, 60, 61, 62, 62, 63, 63, 64, 65

Offset

1,3

Links

Table of n, a(n) for n=1..73.

Crossrefs

Cf. A081330, A081326, A003586, A081329.

Sequence in context: A030066 A355479 A192438 * A369261 A369260 A296088

Adjacent sequences: A081328 A081329 A081330 * A081332 A081333 A081334

Keyword

nonn

Author

Reinhard Zumkeller, Mar 19 2003

Status

approved