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A138671 Indices of 1's in Stewart's choral sequence. 1
2, 5, 7, 8, 11, 14, 16, 17, 20, 22, 23, 25, 26, 29, 32, 34, 35, 38, 41, 43, 44, 47, 49, 50, 52, 53, 56, 59, 61, 62, 65, 67, 68, 70, 71, 74, 76, 77, 79, 80, 83, 86, 88, 89, 92, 95, 97, 98, 101, 103, 104 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..50.

FORMULA

3^{m+1}n+(5(3^m)-1)/2 for m,n in {0,1,2,...}

CROSSREFS

Cf. A116178, A138670.

Sequence in context: A288464 A111199 A276545 * A286693 A032724 A153308

Adjacent sequences:  A138668 A138669 A138670 * A138672 A138673 A138674

KEYWORD

easy,nonn

AUTHOR

Joel Reyes Noche (joel.noche(AT)up.edu.ph), Mar 26 2008

STATUS

approved

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Last modified April 17 05:12 EDT 2021. Contains 343059 sequences. (Running on oeis4.)