A332984 Triangular numbers also sum of two nonzero pentagonal numbers.

6, 10, 36, 105, 528, 595, 861, 903, 1081, 1128, 1225, 1431, 1711, 2016, 2211, 2278, 2415, 2556, 2926, 3160, 3403, 3741, 4005, 4095, 5050, 5151, 5253, 6105, 6441, 6903, 7750, 8385, 10011, 11476, 12720, 14196, 15400, 15931, 16836, 17391, 18528, 19110

Offset: 1

Author

Olivier Gérard, Mar 05 2020

Keywords

• nonn
• easy

Examples

			    6 =  1 +  5;
   10 =  5 +  5;
   36 =  1 + 35;
  105 = 35 + 70.
		

Links

• Peter Kagey, Table of n, a(n) for n = 1..1000

Crossrefs

A subset of A000217 (triangular numbers) and of A332987 (sums of two nonzero pentagonal numbers).

Cf. A000326 (pentagonal numbers).