A163249 Sum of prime(n) and number of numbers from this set less than n-th nonprime number (A018252(n)).

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)).

Links

Table of n, a(n) for n=1..50.

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

Adjacent sequences: A163246 A163247 A163248 * A163250 A163251 A163252

Keyword

nonn,uned

Author

Jaroslav Krizek, Jul 23 2009

Status

approved