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A115298 Row sums of A115297. 5
1, 3, 7, 13, 21, 31, 43, 55, 73, 91, 115, 139, 165, 193, 227, 263, 301, 339, 381, 423, 471, 517, 569, 625, 685, 745, 809, 871, 937, 1011, 1089, 1167, 1247, 1335, 1425, 1515, 1611, 1707, 1809, 1915, 2023, 2135, 2249, 2363, 2479, 2601, 2735, 2865, 2997, 3129 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Muniru A Asiru, Table of n, a(n) for n = 1..3000

FORMULA

a(n) = Sum_{k=2..n+1} (A000040(k) - A000040(ceiling(k/2))). - Jon Maiga, Jan 04 2019

MAPLE

a:=n->add(ithprime(k)-ithprime(ceil(k/2)), k=2..n+1): seq(a(n), n=1..60); # Muniru A Asiru, Jan 04 2019

MATHEMATICA

Accumulate[Table[Prime[n] - Prime[Ceiling[n/2]], {n, 2, 51}]] (* Jon Maiga, Jan 04 2019 *)

CROSSREFS

Cf. A115297, A000040, A000166, A008276.

Sequence in context: A195020 A169627 A102508 * A161206 A025728 A084537

Adjacent sequences:  A115295 A115296 A115297 * A115299 A115300 A115301

KEYWORD

easy,nonn

AUTHOR

André F. Labossière, Jan 19 2006

EXTENSIONS

More terms from André F. Labossière, Mar 27 2006

STATUS

approved

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Last modified February 15 20:07 EST 2019. Contains 320138 sequences. (Running on oeis4.)