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

0,1

Links

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

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;

Crossrefs

Cf. A214551.

Sequence in context: A193622 A265249 A133451 * A182483 A308818 A323013

Adjacent sequences: A214328 A214329 A214330 * A214332 A214333 A214334

Keyword

nonn

Author

N. J. A. Sloane, Jul 26 2012

Status

approved