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A116359
Numbers that can be written as sum of products of two successive primes.
2
6, 12, 15, 18, 21, 24, 27, 30, 33, 35, 36, 39, 41, 42, 45, 47, 48, 50, 51, 53, 54, 56, 57, 59, 60, 62, 63, 65, 66, 68, 69, 70, 71, 72, 74, 75, 76, 77, 78, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107
OFFSET
1,1
COMMENTS
A116357(a(n)) > 0; complement of A116358.
EXAMPLE
45 = 2*3 + 2*3 + 2*3 + 2*3 + 2*3 + 3*5 =
= 3*5 + 3*5 + 3*5, therefore 45 is a term: A116357(45)=2.
CROSSREFS
Sequence in context: A196391 A343207 A362011 * A141698 A306711 A290965
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Feb 12 2006
STATUS
approved