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A291754 a(n) is the length of stage n in A137844. 2
1, 3, 7, 15, 30, 61, 123, 247, 495, 991, 1983, 3967, 7934, 15869, 31739, 63479, 126959, 253919, 507839, 1015678, 2031357, 4062715, 8125431, 16250863, 32501727, 65003455, 130006911, 260013822, 520027645, 1040055291, 2080110583, 4160221167 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..32.

FORMULA

a(1) = 1; for n > 1, a(n) = 2*a(n-1) + (A137844(n-1) mod 2).

PROG

(Scheme) ;; Use the program given in A137844.

CROSSREFS

Cf. A137844, A291753.

Sequence in context: A062544 A120411 A224520 * A069112 A064084 A090633

Adjacent sequences:  A291751 A291752 A291753 * A291755 A291756 A291757

KEYWORD

nonn

AUTHOR

Antti Karttunen, Aug 31 2017

STATUS

approved

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Last modified December 10 23:29 EST 2019. Contains 329910 sequences. (Running on oeis4.)