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A092768 See Comments line. 1
14, 19, 31, 39, 49, 57, 67, 83, 95, 109, 121, 129, 139, 155, 171, 185, 199, 211, 219, 235, 247, 263, 285, 303, 309, 319, 327, 337, 377, 399, 407, 419, 445, 459, 469, 483, 499, 515, 531, 545, 571, 585, 589, 597, 631, 657, 685, 687, 697, 713, 725, 751, 769, 783 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Start with prime numbers, their differences and the absolute values of their differences:
2,.3,.5,.7,.11,.13,.17,.19,.23,.29
..1..2..2..4...2...4...2...4...6
....1..0..2..2...2...2...2...2
and sum the triangles:
a(1)=..2,3,5. = 2+3+5+1+2+1 = 14
........1,2
.........1
a(2)=..3,5,7. = 3+5+7+2+2+0 = 19
........2,2
.........0
etc.
LINKS
MATHEMATICA
difs[n_]:=Total[Flatten[{n, Abs[Differences[n]], Abs[Differences[n, 2]]}]]; difs/@Partition[Prime[Range[60]], 3, 1] (* Harvey P. Dale, Dec 19 2011 *)
CROSSREFS
Sequence in context: A007629 A349421 A241199 * A144080 A006576 A349262
KEYWORD
nonn,easy
AUTHOR
Jorge Coveiro, Apr 14 2004
EXTENSIONS
More terms from Pab Ter (pabrlos(AT)yahoo.com), May 24 2004
STATUS
approved

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)