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A093110
Numbers that can be written as a sum of three elements from A051912.
1
0, 1, 2, 3, 4, 5, 6, 8, 9, 12, 13, 14, 15, 17, 18, 21, 26, 27, 30, 32, 33, 34, 36, 37, 39, 40, 45, 46, 49, 58, 64, 65, 68, 71, 72, 73, 75, 76, 77, 79, 84, 85, 88, 96, 97, 103, 104, 107, 116, 124, 125, 126, 128, 129, 132, 135, 137, 138, 141, 142, 143, 146, 150, 155, 156
OFFSET
0,3
COMMENTS
a(n) increases as n^1.42.
EXAMPLE
15 occurs since it can be written as 1 + 1 + 13; 16 does not occur since it cannot be written as a sum of at most 3 terms from the set {0,1,4,13,32,...} = A051912.
MATHEMATICA
li=Take[A051912, 16]; Select[Union[Flatten[Outer[Plus, li, li, li]]], # <= Last[li] &]
CROSSREFS
Sequence in context: A330193 A372667 A101271 * A165707 A052063 A129525
KEYWORD
easy,nonn
AUTHOR
Wouter Meeussen, Mar 20 2004
STATUS
approved