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A119746
Sum of previous term and preceding relatively prime terms.
0
1, 2, 3, 6, 7, 19, 38, 49, 118, 197, 440, 716, 992, 1268, 1544, 1820, 2040, 2313, 9524, 12113, 33210, 45596, 60298, 74944, 89646, 102032, 116678, 129067, 684624, 826077, 1219334, 2189180, 2203807, 7807703, 15615406, 18789059, 50019871, 100039302
OFFSET
1,2
FORMULA
a(1)=1, a(2)=2, for n>=2, a(n+1) = a(n) + sum_{1<=k<n, gcd(a(n),a(k))=1} a(k).
CROSSREFS
Cf. A120610.
Sequence in context: A064292 A079663 A064622 * A328023 A265481 A023785
KEYWORD
nonn
AUTHOR
STATUS
approved