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A172235 n-th partial sum of primes of the form 3*k+1/2+-1/2 minus n-th partial sum of primes of the form 3*m-1. 0
1, 3, 5, 7, 15, 23, 25, 39, 53, 67, 75, 89, 103, 111, 131, 157, 177, 197, 211, 225, 245, 265, 285, 311, 313, 321, 353, 379, 405, 449, 493, 543, 587, 625, 675, 701, 727, 765, 791, 823, 855, 875, 901, 921, 959 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..45.

FORMULA

a(n)=A172113(n)-A172188(n).

EXAMPLE

a(1)=(3*1+1/2-1/2)-(3*1-1)=1; a(2)=(3+3*2+1/2+1/2)-(2+3*2-1)=3.

CROSSREFS

Cf. A172188, A172113.

Sequence in context: A194360 A057743 A071169 * A163979 A124248 A029514

Adjacent sequences:  A172232 A172233 A172234 * A172236 A172237 A172238

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov, Feb 01 2010

EXTENSIONS

Corrected (453 replaced by 493) by R. J. Mathar, May 22 2010

STATUS

approved

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Last modified September 22 19:36 EDT 2021. Contains 347608 sequences. (Running on oeis4.)