A224829 Numbers m, such that there is no solution m = x + y + 3*z, with triangular numbers x, y, z.

8, 17, 26, 35, 44, 53, 62, 71, 77, 80, 89, 98, 107, 116, 125, 134, 143, 152, 158, 161, 170, 179, 188, 197, 206, 215, 224, 233, 239, 242, 251, 260, 269, 278, 287, 296, 305, 314, 320, 323, 332, 341, 350, 359, 368, 377, 386, 395, 401, 404, 413, 422, 431, 440

Offset

1,1

Comments

A224823(a(n)) = 0;

terms not of the form 9*k+8: 77,158,239,320,401,482,563,644,698,... .

Links

Reinhard Zumkeller, Table of n, a(n) for n = 1..1000

Prog

(Haskell)
a224829 n = a224829_list !! n
a224829_list = filter ((== 0) . a224823) [0..]

Crossrefs

Cf. A017257 (subsequence), A000217.

Sequence in context: A338090 A043485 A031495 * A273188 A017257 A052222

Adjacent sequences: A224826 A224827 A224828 * A224830 A224831 A224832

Keyword

nonn

Author

Reinhard Zumkeller, Jul 21 2013

Status

approved