A291754 a(n) is the length of stage n in A137844.

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

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: A120411 A350606 A224520 * A336685 A069112 A064084

Adjacent sequences: A291751 A291752 A291753 * A291755 A291756 A291757

Keyword

nonn

Author

Antti Karttunen, Aug 31 2017

Status

approved