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A087019
Lunar squares: n*n where * is lunar multiplication (A087062).
14
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 100, 111, 112, 113, 114, 115, 116, 117, 118, 119, 200, 211, 222, 223, 224, 225, 226, 227, 228, 229, 300, 311, 322, 333, 334, 335, 336, 337, 338, 339, 400, 411, 422, 433, 444, 445, 446, 447, 448, 449, 500, 511, 522, 533, 544, 555, 556, 557, 558
OFFSET
0,3
COMMENTS
Sequence is not monotonic (1011*1011 = 1011111 > 1020*1020 = 1010200). In fact it even contains repetitions (11011*11011 = 11111*11111 = 111111111). See A172199. - N. J. A. Sloane, Dec 20 2010
LINKS
D. Applegate, C program for lunar arithmetic and number theory, [Note: we have now changed the name from "dismal arithmetic" to "lunar arithmetic" - the old name was too depressing]
D. Applegate, M. LeBrun and N. J. A. Sloane, Dismal Arithmetic, arXiv:1107.1130 [math.NT], 2011. [Note: we have now changed the name from "dismal arithmetic" to "lunar arithmetic" - the old name was too depressing]
D. Applegate, M. LeBrun, N. J. A. Sloane, Dismal Arithmetic, J. Int. Seq. 14 (2011) # 11.9.8.
Brady Haran and N. J. A. Sloane, Primes on the Moon (Lunar Arithmetic), Numberphile video, Nov 2018.
Christian Woll, There is a 3X3 Magic Square of Squares on the Moon - A Lot of Them, Actually, arXiv:1811.04923 [math.HO], 2018.
FORMULA
a(n)=A087062(n,n). - M. F. Hasler, Nov 15 2018
PROG
(PARI) apply( A087019(n)=A087062(n, n), [1..60]) \\ M. F. Hasler, Nov 15 2018
CROSSREFS
Cf. A087062 (lunar product), A087097 (lunar primes).
Sequence in context: A218556 A043314 A088472 * A044911 A110734 A080436
KEYWORD
nonn,base
AUTHOR
Marc LeBrun and N. J. A. Sloane, Oct 19 2003
STATUS
approved