|
Search: id:A109725
|
|
|
| A109725 |
|
Divide primes in groups with 2n+1 elements and add together. |
|
+0
3
|
|
| 2, 15, 83, 281, 679, 1367, 2461, 4005, 6223, 9017, 12755, 17281, 22967, 29597, 37793, 47229, 57993, 70957, 85343, 101777, 119469, 141079, 163313, 188201, 216203, 247203, 280897, 316551, 355905, 398825, 445509, 494953, 549737, 605711, 665185
(list; graph; listen)
|
|
|
OFFSET
|
0,1
|
|
|
COMMENT
|
First difference of A109724.
|
|
FORMULA
|
a(n) = A109724(n+1) - A109724(n) = A007504((n+1)^2) - A007504(n^2).
|
|
MATHEMATICA
|
f[n_] := Sum[Prime[k], {k, n}]; Table[f[(n+1)^2] - f[n^2], {n, 0, 34}]
|
|
CROSSREFS
|
Cf. A007504, A109722-A109726.
Sequence in context: A041243 A056079 A036239 this_sequence A057152 A002740 A108475
Adjacent sequences: A109722 A109723 A109724 this_sequence A109726 A109727 A109728
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Aug 10 2005
|
|
EXTENSIONS
|
Edited and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Aug 11 2005
|
|
|
Search completed in 0.002 seconds
|
