A236916 The first "octad" is 0, 1, 2, 2, 2, 2, 3, 3; thereafter add 4 to get the next octad.

0, 1, 2, 2, 2, 2, 3, 3, 4, 5, 6, 6, 6, 6, 7, 7, 8, 9, 10, 10, 10, 10, 11, 11, 12, 13, 14, 14, 14, 14, 15, 15, 16, 17, 18, 18, 18, 18, 19, 19, 20, 21, 22, 22, 22, 22, 23, 23, 24, 25, 26, 26, 26, 26, 27, 27, 28, 29, 30, 30, 30, 30, 31, 31, 32, 33, 34, 34, 34, 34, 35, 35, 36, 37, 38, 38, 38, 38, 39, 39, 40, 41, 42, 42

Offset: 0

Author

N. J. A. Sloane, Feb 01 2014

Keywords

• nonn

Links

• Index entries for linear recurrences with constant coefficients, signature (1,0,0,0,0,0,0,1,-1).

Crossrefs

Cf. A236680. A034583 is a very similar sequence.

Programs

Mathematica

Flatten[NestList[4+#&,{0,1,2,2,2,2,3,3},10]] (* Harvey P. Dale, Oct 19 2015 *)

Formula

G.f.: (x+x^2+x^6+x^8)/((1-x)*(1-x^8)). - Robert Israel, Jun 09 2020