login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A052348 Indices of A052343 (ways to write n as sum of two triangular numbers) where record values are reached. 7

%I #12 Aug 21 2016 12:53:56

%S 0,6,81,276,1056,1381,6906,17956,34531,40056,200281,520731,1001406,

%T 1482081,7410406,19267056,37052031,60765331,303826656,789949306,

%U 1519133281,3220562556,13429138206,16102812781,41867313231,80514063906,196454315931,711744324931

%N Indices of A052343 (ways to write n as sum of two triangular numbers) where record values are reached.

%H Kenneth Korbin, <a href="http://www.jstor.org/stable/2687550">Problem 665</a>, The College Mathematics Journal Vol. 30 No. 5, Nov. 1999.

%e a(2) = 6 because 6 = 6 + 0 = 3 + 3. a(3) = 81 because 81 = 3 + 78 = 15 + 66 = 36 + 55.

%Y Probably differs from A053587 only at n=1, 2, 4.

%Y Cf. A000217, A052343, A052344, A052345, A052346, A052347.

%K nonn

%O 1,2

%A _Christian G. Bower_, Jan 23 2000

%E a(23)-a(26) from _Donovan Johnson_, May 24 2009

%E a(27)-a(28) from _Donovan Johnson_, Mar 20 2013

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)