|
| |
|
|
A034960
|
|
Divide odd numbers in groups with prime p elements and add together.
|
|
2
| |
|
|
4, 21, 75, 189, 495, 897, 1683, 2565, 4071, 6641, 8959, 13209, 17835, 22317, 28623, 37577, 48439, 57401, 71623, 85697, 98623, 118737, 138195, 163493, 196231, 224321, 249775, 281945, 310759, 347249, 420751, 467801, 525943, 571985, 656047
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,1
|
|
|
EXAMPLE
| {1,3} #2 S=4; {5,7,9} #3 S=21; {11,13,15,17,19} #5 S=75; {21,23,25,27,29,31,33} #7 S=189; etc.
|
|
|
MAPLE
| S:= n-> sum(ithprime(k), k=1..n): seq(S(n+1)^2-S(n)^2, n=1..40). [From Gary Detlefs, Dec 20 2011]
|
|
|
CROSSREFS
| Cf. A006003, A027441, A034959.
Cf. A007504
Sequence in context: A078800 A184706 A057333 * A157493 A192429 A163697
Adjacent sequences: A034957 A034958 A034959 * A034961 A034962 A034963
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Patrick De Geest (pdg(AT)worldofnumbers.com), Oct 15 1998.
|
| |
|
|
