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 A169855 EKG sequence started at 12 instead of 2. 13
 12, 2, 4, 6, 3, 9, 15, 5, 10, 8, 14, 7, 21, 18, 16, 20, 22, 11, 33, 24, 26, 13, 39, 27, 30, 25, 35, 28, 32, 34, 17, 51, 36, 38, 19, 57, 42, 40, 44, 46, 23, 69, 45, 48, 50, 52, 54, 56, 49, 63, 60, 55, 65, 70, 58, 29, 87, 66, 62, 31, 93, 72, 64, 68, 74, 37, 111, 75, 78, 76, 80, 82, 41 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A generalization of A064413. LINKS Peter Kagey, Table of n, a(n) for n = 1..10000 PROG (Python) from math import gcd def aupton(terms): alst, aset = [12], {12} for n in range(2, terms+1): k = 2 while True: while k in aset: k += 1 if gcd(alst[-1], k) != 1: alst.append(k); aset.add(k); break k += 1 return alst print(aupton(73)) # Michael S. Branicky, Dec 02 2021 CROSSREFS For other initial terms, see A064413, A169837, A169839, A169841, A169843,A169845, A169847, A169849, A169851, A169853. Sequence in context: A080496 A098781 A040142 * A054383 A036383 A107832 Adjacent sequences: A169852 A169853 A169854 * A169856 A169857 A169858 KEYWORD nonn AUTHOR T. D. Noe and N. J. A. Sloane, Jun 02 2010 STATUS approved

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Last modified August 15 02:04 EDT 2024. Contains 375171 sequences. (Running on oeis4.)