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A332984
Triangular numbers also sum of two nonzero pentagonal numbers.
2
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
1,1
EXAMPLE
6 = 1 + 5;
10 = 5 + 5;
36 = 1 + 35;
105 = 35 + 70.
CROSSREFS
A subset of A000217 (triangular numbers) and of A332987 (sums of two nonzero pentagonal numbers).
Cf. A000326 (pentagonal numbers).
Sequence in context: A068889 A203485 A221519 * A038264 A094890 A213477
KEYWORD
nonn,easy
AUTHOR
Olivier Gérard, Mar 05 2020
STATUS
approved