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A164653 a(1) = 1, for n>=2: a(n) = sum of two consecutive noncomposite numbers A008578. 2
1, 3, 5, 8, 12, 18, 24, 30, 36, 42, 52, 60, 68, 78, 84, 90, 100, 112, 120, 128, 138, 144, 152, 162, 172, 186, 198, 204, 210, 216, 222, 240, 258, 268, 276, 288, 300, 308, 320, 330, 340, 352, 360, 372, 384, 390, 396, 410, 434, 450, 456, 462, 472, 480, 492, 508 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Basically these are the sums of two successive primes. - N. J. A. Sloane, Nov 16 2018
Essentially the same as A001043, A011974 and A069102.
LINKS
FORMULA
a(n) = A158611(n) + A158611(n+1).
a(n) = A008578(n-1) + A008578(n) for n >= 2.
a(n) = A076273(n-1) + 1 for n >= 2.
a(n) = A000040(n-1) + A008578(n-1) for n >= 2. - Jaroslav Krizek, Dec 13 2009
MATHEMATICA
ListConvolve[{1, 1}, Join[{0, 1}, Prime[Range[100]]]] (* Paolo Xausa, Nov 02 2023 *)
CROSSREFS
Sequence in context: A265062 A265063 A098202 * A001973 A248374 A020745
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Aug 19 2009
EXTENSIONS
Edited by R. J. Mathar, Aug 21 2009
Correction for change of offset in A158611 and A008578 in Aug 2009 by Jaroslav Krizek, Jan 27 2010
Formulas edited by Paolo Xausa, Nov 04 2023
STATUS
approved

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)