A246315 A246314(2^n-1).

1, 9, 37, 157, 713, 2737, 11421, 44021, 176801, 683369, 2695829, 10433229, 40796217

Offset

0,2

Links

Table of n, a(n) for n=0..12.

Example

a(1)=9 and a(2)=37 are illustrated in A246314.

Crossrefs

Cf. A246314.

Sequence in context: A288415 A026620 A048878 * A232250 A201441 A183327

Adjacent sequences: A246312 A246313 A246314 * A246316 A246317 A246318

Keyword

nonn,more

Author

N. J. A. Sloane, Aug 26 2014

Extensions

a(9) from Alois P. Heinz, Sep 01 2014

a(10)-a(12) from N. J. A. Sloane, Sep 04 2014

Status

approved