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Partial sums of A213709.
20

%I #11 Jul 03 2022 08:49:48

%S 0,1,2,4,7,12,21,38,68,122,220,399,729,1343,2493,4655,8727,16405,

%T 30901,58319,110298,209098,397407,757296,1446945,2771951,5323982,

%U 10250571,19780122,38243220,74058513,143592684,278661808,541110611,1051158027,2042539460,3969857205

%N Partial sums of A213709.

%C a(n) tells the position of (2^n)-1 in A179016.

%o (Scheme with _Antti Karttunen_'s Intseq-library): (define A218600 (PARTIALSUMS 1 0 A213709))

%Y a(n) = A213710(n)-1. A179016(a(n))=(2^n)-1. Cf. A213711.

%K nonn

%O 0,3

%A _Antti Karttunen_, Nov 05 2012

%E a(29)-a(36) from _Alois P. Heinz_, Jul 03 2022