login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A120878 a(n) = sum of first n terms of sequence A120877. 1
1, 2, 4, 7, 9, 12, 18, 25, 27, 31, 33, 37, 39, 43, 45, 49, 52, 64, 76, 88, 100, 112, 125, 127, 129, 134, 144, 167, 169, 172, 187, 189, 196, 214, 226, 238, 252, 284, 300, 331, 333, 339, 345, 354, 374, 387, 394, 407, 409, 411, 417, 423, 430, 447, 453, 459, 467, 469 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..58.

PROG

(PARI) {m=60; v=[1]; for(n=2, m, a=0; q=sum(i=1, n-1, v[i]); for(j=1, n-1, if(q%v[j]==0, a++)); print1(q, ", "); v=concat(v, a))} - (Klaus Brockhaus, Aug 16 2006)

CROSSREFS

Cf. A120877.

Sequence in context: A186357 A212988 A064491 * A137996 A080057 A087158

Adjacent sequences:  A120875 A120876 A120877 * A120879 A120880 A120881

KEYWORD

nonn

AUTHOR

Leroy Quet, Jul 10 2006

EXTENSIONS

More terms from Klaus Brockhaus, Aug 16 2006

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 August 26 00:35 EDT 2019. Contains 326324 sequences. (Running on oeis4.)