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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A122493 Union of Fibonacci and triangular numbers. 1
0, 1, 2, 3, 5, 6, 8, 10, 13, 15, 21, 28, 34, 36, 45, 55, 66, 78, 89, 91, 105, 120, 136, 144, 153, 171, 190, 210, 231, 233, 253, 276, 300, 325, 351, 377, 378, 406, 435, 465, 496, 528, 561, 595, 610, 630, 666, 703, 741, 780, 820, 861, 903, 946, 987, 990, 1035, 1081 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Harvey P. Dale, Table of n, a(n) for n = 0..1000

MAPLE

#does not generate terms in order# with(combinat, fibonacci): for i from 1 to 20 do fibonacci(i); sum(k, k=0..i); end do;

MATHEMATICA

Module[{upto=1100, f=1, tr}, While[Fibonacci[f]<upto, f++]; tr=Ceiling[ (Sqrt[ 1+8*upto]-1)/2]; Select[Join[Fibonacci[Range[0, f]], Accumulate[Range[ tr]]]// Union, #<=upto&]] (* Harvey P. Dale, Oct 21 2016 *)

CROSSREFS

Cf. A000045, A000217.

Sequence in context: A229172 A056837 A001971 * A284830 A053873 A240314

Adjacent sequences:  A122490 A122491 A122492 * A122494 A122495 A122496

KEYWORD

nonn

AUTHOR

Ben Paul Thurston, Sep 16 2006

EXTENSIONS

More terms from Franklin T. Adams-Watters, Sep 20 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified October 20 05:42 EDT 2017. Contains 293601 sequences.