login
A316324
Indices of 1's in A305389.
5
0, 5, 9, 14, 19, 23, 28, 31, 36, 40, 45, 49, 54, 57, 62, 66, 71, 76, 80, 85, 88, 93, 97, 102, 107, 111, 116, 119, 124, 128, 133, 137, 142, 145, 150, 154, 159, 164, 168, 173, 176, 181, 185, 190, 193, 198, 202, 207, 212, 216, 221, 224, 229, 233, 238, 242, 247, 250, 255, 259, 264, 269, 273, 278
OFFSET
1,2
LINKS
MAPLE
f:= 'f':
f(1):= 2: f(2):= 3: f(3):= (1, 2, 3):
S:= [1];
for i from 1 to 5 do T:= map(f, S); U:= map(f, T); S:= map(f, U); od:
select(t -> S[t+1]=1, [$0..nops(S)-1]); # Robert Israel, May 07 2019
CROSSREFS
Cf. A305389.
A316324, A316325, A316326 have the same relation to A305389 as A003144, A003145, A003146 do to the ternary tribonacci word A080843 (or A092782).
Sequence in context: A314886 A140490 A314887 * A247972 A301298 A314888
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jul 09 2018
STATUS
approved