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 A156834 A156348 * A000010 5
 1, 2, 3, 5, 5, 12, 7, 17, 19, 30, 11, 63, 13, 56, 99, 89, 17, 154, 19, 269, 237, 132, 23, 509, 301, 182, 379, 783, 29, 1230, 31, 881, 813, 306, 2125, 2431, 37, 380, 1299, 4157, 41, 4822, 43, 3695, 6175, 552, 47, 8529, 5587, 6266, 2787 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Conjecture: for n>1, a(n) = n iff n is prime. Companion to A156833. LINKS FORMULA Equals A156348 * A054525 * [1, 2, 3,...]; where A054525 = the inverse Mobius transform. EXAMPLE a(4) = 5 = (1, 2, 0, 1) dot (1, 1, 2, 2) = (1 + 2 + 0 + 2), where row 4 of A156348 = (1, 2, 0, 1) and (1, 1, 2, 2) = the first 4 terms of Euler's phi function. MAPLE A156834 := proc(n)         add(A156348(n, k)*numtheory[phi](k), k=1..n) ; end proc: # R. J. Mathar, Mar 03 2013 CROSSREFS Cf. A156348, A000010, A156833 Equals row sums of triangle A157030 [From Gary W. Adamson, Feb 21 2009] Sequence in context: A152076 A133278 A050368 * A079024 A319631 A097453 Adjacent sequences:  A156831 A156832 A156833 * A156835 A156836 A156837 KEYWORD nonn,easy AUTHOR Gary W. Adamson, Feb 16 2009 EXTENSIONS Extended beyond a(14) by R. J. Mathar, Mar 03 2013 STATUS approved

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Last modified August 18 04:50 EDT 2019. Contains 326072 sequences. (Running on oeis4.)