A214331 a(n) = (a(n-1) + a(n-3))/gcd(a(n-1), a(n-3)) with a(0) =2, a(1) = 3, a(2) = 5.

2, 3, 5, 7, 10, 3, 10, 2, 5, 3, 5, 2, 5, 2, 2, 7, 9, 11, 18, 3, 14, 16, 19, 33, 49, 68, 101, 150, 109, 210, 12, 121, 331, 343, 464, 795, 1138, 801, 532, 835, 1636, 542, 1377, 3013, 3555, 548, 3561, 2372, 730, 4291, 6663, 7393, 11684, 18347, 25740, 9356, 27703, 4111, 13467, 41170, 45281, 58748, 49959, 95240, 38497, 88456, 22962, 61459, 149915, 172877, 234336, 384251

Offset: 0

Author

N. J. A. Sloane, Jul 26 2012

Keywords

• nonn

Links

• N. J. A. Sloane, Table of n, a(n) for n = 0..10000

Crossrefs

Cf. A214551.

Programs

Maple

t := [2, 3, 5];
for n from 4 to 1000 do
t:=[op(t), (t[n-1]+t[n-3])/gcd(t[n-1],t[n-3])];
od:
t;