login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A088938 Occurrences of 2's in A088936. 4
2, 3, 5, 10, 27, 104, 541, 3498, 26615, 231172, 2250129, 24227486, 285705643, 3660694200, 50624828357, 751426146514, 11913622408671, 200919532718828, 3591112295892985, 67803855263483142, 1348467602319393299 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..21.

FORMULA

a(n)=2+(1/2)*sum(k=1, n, sum(i=0, k, i!)), [Benoit Cloitre and Claude Lenormand]

CROSSREFS

Cf. A088936, A088937, A088939, A088940.

Sequence in context: A204518 A336991 A223545 * A000617 A132183 A259878

Adjacent sequences:  A088935 A088936 A088937 * A088939 A088940 A088941

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Oct 25 2003

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 17 05:13 EDT 2021. Contains 343965 sequences. (Running on oeis4.)