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A163249
Sum of prime(n) and number of numbers from this set less than n-th nonprime number (A018252(n)).
0
2, 5, 8, 11, 15, 17, 22, 25, 29, 35, 38, 45, 49, 51, 56, 62, 68, 70, 76, 81, 84, 90, 94, 100, 108, 113, 115, 119, 122, 127, 141, 145, 152, 154, 164, 166, 172, 179, 183, 189, 195, 197, 208, 211, 215, 217, 229, 241, 246, 248
OFFSET
1,1
COMMENTS
a(n) = Sum of n-th nonprime number (A018252(n)) and number of numbers from this set less than n-th prime (A000040(n)).
FORMULA
a(n) = prime(n) + A073425(n-1) = A018252(n) + A014689(n) = prime(n) + A018252(n)- n = prime(n) + A002808(n) - n.
CROSSREFS
Sequence in context: A329604 A190079 A184872 * A295624 A284882 A190364
KEYWORD
nonn,uned
AUTHOR
Jaroslav Krizek, Jul 23 2009
STATUS
approved