OFFSET
0,1
COMMENTS
Row sums of A138143. - Omar E. Pol, Feb 13 2014
For n = 3..9, a(n) = 3*(n^2 - 3*n + 5). - Nicholas Drozd, Apr 10 2021
LINKS
Paolo Xausa, Table of n, a(n) for n = 0..10000 (terms 0..1000 from Harry J. Smith)
FORMULA
a(n) = a(n-1) + prime(n) + prime(n-1).
a(n) = A007504(n) + A007504(n+1) so we have the asymptotic expansion a(n) ~ n^2*log(n). - Henry Bottomley, May 30 2001
MATHEMATICA
Accumulate[Join[{2}, ListConvolve[{1, 1}, Prime[Range[100]]]]] (* Paolo Xausa, Oct 31 2023 *)
PROG
(PARI) { n=-1; a=q=0; forprime (p=2, prime(1001), write("b061802.txt", n++, " ", a+=p + q); q=p ) } \\ Harry J. Smith, Jul 28 2009
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Amarnath Murthy, May 28 2001
EXTENSIONS
More terms from Larry Reeves (larryr(AT)acm.org), May 29 2001
STATUS
approved