A067923 Engel expansion of log(23).

1, 1, 1, 8, 12, 135, 199, 378, 600, 1836, 4897, 8198, 8993, 84887, 450287, 892157, 5053447, 5183243, 15350505, 19963471, 31631271, 37655416, 2138752269, 4805947342, 14508700588, 27508373127, 28635924075, 30814114095, 32073629885, 961160400603, 3607716972786

Offset: 1

Author

Benoit Cloitre, Mar 03 2002

Keywords

• easy
• nonn

Crossrefs

See A006784 for explanation of Engel expansions. Log(23) is the first number of the form Log(n), n an integer, for which it is not known whether a BBP formula exists.

Cf. A016646.

Programs

PARI

\\ a(1)=1 and for n>1:
s=log(23); for(i=1,30,s=s*ceil(1/s)-1; print1(ceil(1/s),","); );