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A169851
EKG sequence started at 10 instead of 2.
9
10, 2, 4, 6, 3, 9, 12, 8, 14, 7, 21, 15, 5, 20, 16, 18, 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
OFFSET
1,1
COMMENTS
A generalization of A064413.
PROG
(Python)
from math import gcd
def aupton(terms):
alst, aset = [1, 10], {1, 10}
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[1:]
print(aupton(73)) # Michael S. Branicky, Oct 02 2021
CROSSREFS
For other initial terms, see A064413, A169837, A169839, A169841, A169843, A169845, A169847, A169849, A169853, A169855.
Cf. A169852.
Sequence in context: A371113 A049296 A220468 * A161995 A069036 A155817
KEYWORD
nonn
AUTHOR
T. D. Noe and N. J. A. Sloane, Jun 02 2010
STATUS
approved