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A187486
Distance between first and second positions of A181762(n).
0
0, 15, 0, 25, 0, 35, 0, 45, 0, 55, 0, 65, 0, 75, 0, 85, 15, 95, 0, 105, 0, 115, 0, 125, 0, 135, 0, 145, 25, 155, 0, 165, 0, 175, 0, 185, 0, 195, 0, 205, 35, 215, 0, 225, 0, 235, 0, 245, 0, 255, 0, 265, 45, 275, 0, 285, 0, 295, 0, 305, 0, 315, 0, 325, 55, 335, 0, 345, 0, 355
OFFSET
0,2
COMMENTS
Some entries of A181762 occur twice some only once.
The sequence gives the distance between first and second positions of A181762(n),
a(n)=0 if A181762(n) occurs only once.
The numbers that occur in A181762 only once are 0, 2, 4, 6, 8, 10, 12, 14, 18, 20, 22, 24, 26, 30, 32, 34, 36, 38, 42, 44, 46, ...
CROSSREFS
Cf. A181762.
Sequence in context: A202857 A055965 A067154 * A141027 A186436 A054670
KEYWORD
nonn
AUTHOR
Zak Seidov, Mar 10 2011
STATUS
approved