A052348 Indices of A052343 (ways to write n as sum of two triangular numbers) where record values are reached.

0, 6, 81, 276, 1056, 1381, 6906, 17956, 34531, 40056, 200281, 520731, 1001406, 1482081, 7410406, 19267056, 37052031, 60765331, 303826656, 789949306, 1519133281, 3220562556, 13429138206, 16102812781, 41867313231, 80514063906, 196454315931, 711744324931

Offset

1,2

Links

Table of n, a(n) for n=1..28.

Kenneth Korbin, Problem 665, The College Mathematics Journal Vol. 30 No. 5, Nov. 1999.

Example

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

Crossrefs

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

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

Sequence in context: A358037 A002676 A374923 * A309902 A196909 A197076

Adjacent sequences: A052345 A052346 A052347 * A052349 A052350 A052351

Keyword

nonn

Author

Christian G. Bower, Jan 23 2000

Extensions

a(23)-a(26) from Donovan Johnson, May 24 2009

a(27)-a(28) from Donovan Johnson, Mar 20 2013

Status

approved