A224829 - OEIS

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

(list; graph; refs; listen; history; text; internal format)

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..]