A291753 a(n) is the length of stage n in A137843.

1, 3, 6, 13, 27, 54, 109, 218, 437, 874, 1749, 3499, 6998, 13997, 27995, 55991, 111982, 223965, 447931, 895862, 1791725, 3583450, 7166901, 14333802, 28667605, 57335211, 114670422, 229340845, 458681691, 917363382, 1834726765, 3669453531, 7338907062, 14677814125, 29355628250, 58711256501, 117422513002, 234845026005

Offset

1,2

Links

Table of n, a(n) for n=1..38.

Formula

a(1) = 1; for n > 1, a(n) = 2*a(n-1) + (A137843(n-1) mod 2).

Prog

(Scheme) ;; Use the program given in A137843.

Crossrefs

Cf. A137843, A291754.

a(n) differs from similar A112306(n-1) for the first time at n=15, where a(15) = 27995, while A112306(14) = 27994.

Sequence in context: A123247 A212444 A112306 * A033129 A079403 A065830

Adjacent sequences: A291750 A291751 A291752 * A291754 A291755 A291756

Keyword

nonn

Author

Antti Karttunen, Aug 31 2017

Status

approved