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A332988 Sums of two distinct nonzero pentagonal numbers. 5
6, 13, 17, 23, 27, 34, 36, 40, 47, 52, 56, 57, 63, 71, 73, 75, 82, 86, 92, 93, 97, 104, 105, 114, 118, 121, 122, 127, 129, 139, 143, 146, 150, 152, 157, 162, 167, 168, 177, 180, 181, 187, 188, 196, 198, 209, 211, 215, 222, 227, 232, 237, 245, 246, 248, 252, 259, 261, 262, 268, 269, 280, 282, 288, 292, 293, 298, 299, 302, 309, 317, 321, 322, 327, 331, 335, 338, 339, 342, 352, 355, 357, 364, 365, 377, 379, 381, 386, 388, 392, 398 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A subset of A332987.

LINKS

Table of n, a(n) for n=1..91.

MATHEMATICA

Total/@Subsets[PolygonalNumber[5, Range[20]], {2}]//Union (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Apr 22 2020 *)

CROSSREFS

Cf. A000326 (pentagonal numbers).

Sequence in context: A090068 A070899 A265756 * A333011 A197562 A322431

Adjacent sequences:  A332985 A332986 A332987 * A332989 A332990 A332991

KEYWORD

nonn,easy

AUTHOR

Olivier Gérard, Mar 05 2020

STATUS

approved

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Last modified July 12 10:02 EDT 2020. Contains 335657 sequences. (Running on oeis4.)