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 A173016 Numbers k such that sequence of type a_k(n): {a(1) = 1, for n >= 2: a(n) = the smallest number h such that sigma(h) = A000203(h) = a(n-1) + k, a(n) = 0 if no such number exists} is not sequence A063524(n) for n >= 1. 4
 1, 2, 3, 4, 5, 6, 7, 8, 11, 12, 13, 14, 15, 17, 18, 19, 20, 23, 24, 27, 28, 29, 30, 31, 32, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 47, 48, 53, 54, 55, 56, 57, 59, 60, 61, 62, 63, 67, 68, 71, 72, 73, 74, 77, 78, 79, 80, 83, 84, 89, 90, 91, 92, 93, 95, 96, 97, 98, 101 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS A063524(n) = characteristic function of 1 = 1,0,0,0,0,0,0,0,0,0,0,0,... Numbers k such that A051444(k) and A051444(k+1) are not simultaneously equal 0. Complement of A173015. LINKS EXAMPLE a(1) = k = 1 because a_1(n)= A000035(n) = 1,0,1,0,1,0,1,0,1,0,1,0,... a(2) = k = 2 because a_2(n)= A173012(n) = 1,2,3,0,0,0,0,0,0,0,0,0,... a(3) = k = 3 because a_3(n)= A173013(n) = 1,3,5,7,0,2,0,2,0,2,0,2,... a(3) = k = 4 because a_4(n)= A173014(n) = 1,0,3,4,7,0,3,4,7,0,3,4,... CROSSREFS Cf. A000035, A173012, A173013, A173014, A173015. Sequence in context: A032847 A023778 A329299 * A053577 A093515 A350242 Adjacent sequences:  A173013 A173014 A173015 * A173017 A173018 A173019 KEYWORD nonn AUTHOR Jaroslav Krizek, Nov 06 2010 STATUS approved

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Last modified June 30 03:34 EDT 2022. Contains 354913 sequences. (Running on oeis4.)