A277738 Positions of 2's in A277735.

3, 12, 16, 20, 27, 34, 43, 47, 56, 60, 69, 73, 77, 84, 93, 97, 101, 108, 117, 121, 125, 132, 139, 148, 152, 161, 165, 169, 176, 183, 192, 196, 205, 209, 213, 220, 227, 236, 240, 249, 253, 262, 266, 270, 277, 286, 290, 294, 301, 308, 317, 321, 330, 334, 343, 347, 351, 358, 367, 371, 375, 382, 389, 398

Offset

1,1

Comments

{A277736, A277737, A277738} forms a three-way partition of the positive integers, similar to {A003144, A003145, A003146}.

Links

N. J. A. Sloane, Table of n, a(n) for n = 1..10609

Maple

with(ListTools);
T:=proc(S) Flatten(subs( {0=[0, 1], 1=[2, 0], 2=[0]}, S)); end;
S:=[0];
for n from 1 to 14 do S:=T(S); od:
S; # A277735
p0:=[]: p1:=[]: p2:=[]:
for i from 1 to nops(S) do
j:=S[i];
if j=0 then p0:=[op(p0), i];
elif j=1 then p1:=[op(p1), i];
else p2:=[op(p2), i]; fi: od:
p0; # A277736
p1; # A277737
p2: # A277738

Crossrefs

Cf. A277735, A277736, A277737.

Cf. also A003144, A003145, A003146.

Sequence in context: A009783 A341013 A192786 * A064106 A022411 A115229

Adjacent sequences: A277735 A277736 A277737 * A277739 A277740 A277741

Keyword

nonn

Author

N. J. A. Sloane, Nov 07 2016

Status

approved