A087251 Distinct largest-peak-values in 3x+1 trajectory arranged by their first appearance as initial value increases. A025586 without repetitions while keeping order.

1, 2, 16, 4, 52, 8, 40, 160, 88, 20, 64, 24, 9232, 32, 100, 112, 304, 196, 136, 48, 148, 232, 56, 184, 68, 208, 72, 340, 808, 80, 244, 84, 256, 592, 280, 96, 448, 104, 520, 116, 352, 628, 4372, 128, 132, 400, 916, 424, 144, 1024, 152, 472, 736, 168, 176, 532, 180

Offset: 1

Author

Labos Elemer, Sep 08 2003

Keywords

• nonn

Examples

			peak=160 appears in trajectory started with n=15 and
before peaks = 1,2,16,4,52,8,40 appear at n=1,..,14
initial values: 160=a(8), the 8th new peak-value.
		

Crossrefs

Cf. A025586.