|
| |
|
|
A036263
|
|
Second differences of primes.
|
|
15
| |
|
|
1, 0, 2, -2, 2, -2, 2, 2, -4, 4, -2, -2, 2, 2, 0, -4, 4, -2, -2, 4, -2, 2, 2, -4, -2, 2, -2, 2, 10, -10, 2, -4, 8, -8, 4, 0, -2, 2, 0, -4, 8, -8, 2, -2, 10, 0, -8, -2, 2, 2, -4, 8, -4, 0, 0, -4, 4, -2, -2, 8, 4, -10, -2, 2, 10, -8, 4, -8, 2, 2, 2, -2, 0, -2, 2, 2, -4, 4, 2, -8, 8, -8, 4, -2, 2, 2, -4, -2, 2, 8, -4
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,3
|
|
|
COMMENTS
| a(A064113(n)) = 0. [Reinhard Zumkeller, Jan 20 2012]
|
|
|
LINKS
| T. D. Noe, Table of n, a(n) for n=1..10000
|
|
|
MATHEMATICA
| Table[ Prime[n - 1] + Prime[n + 1] - 2*Prime[n], {n, 2, 105}]
|
|
|
PROG
| (PARI) for(n=2, 100, print1(prime(n+2)-2*prime(n+1)+prime(n)", "))
(Haskell)
a036263 n = a036263_list !! (n-1)
a036263_list = zipWith (-) (tail a001223_list) a001223_list
-- Reinhard Zumkeller, Oct 29 2011
|
|
|
CROSSREFS
| Cf. A001223, A036262, A051635, A006562 & A051634.
Cf. A147812, A147813.
Sequence in context: A064136 A143526 A072924 * A168514 A060447 A118177
Adjacent sequences: A036260 A036261 A036262 * A036264 A036265 A036266
|
|
|
KEYWORD
| sign,easy,nice
|
|
|
AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
|
| |
|
|
