A176710 Mix A001021, 2*A001021.

1, 2, 12, 24, 144, 288, 1728, 3456, 20736, 41472, 248832, 497664, 2985984, 5971968, 35831808, 71663616, 429981696, 859963392, 5159780352, 10319560704, 61917364224, 123834728448, 743008370688, 1486016741376, 8916100448256, 17832200896512, 106993205379072, 213986410758144

Offset

0,2

Comments

Divides A091137. See A165313.

Links

Table of n, a(n) for n=0..27.

Index entries for linear recurrences with constant coefficients, signature (0,12).

Index to divisibility sequences

Formula

a(n)= +12*a(n-2). G.f.: ( -1-2*x ) / ( -1+12*x^2 ). [R. J. Mathar, Apr 26 2010]

Mathematica

LinearRecurrence[{0, 12}, {1, 2}, 30] (* Paolo Xausa, Jan 29 2024 *)

Crossrefs

Sequence in context: A226899 A309278 A052565 * A141900 A211374 A126962

Adjacent sequences: A176707 A176708 A176709 * A176711 A176712 A176713

Keyword

nonn,easy

Author

Paul Curtz, Apr 24 2010

Extensions

a(21)-a(27) from Paolo Xausa, Jan 29 2024

Status

approved