

A087019


Lunar squares: n*n where * is lunar multiplication (A087062).


9



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
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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

N. J. A. Sloane, Table of n, a(n) for n = 0..10000
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 [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.
Index entries for sequences related to dismal (or lunar) arithmetic


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).
Cf. A172199, A180513, A181319, A087097.
Sequence in context: A218556 A043314 A088472 * A044911 A110734 A080436
Adjacent sequences: A087016 A087017 A087018 * A087020 A087021 A087022


KEYWORD

nonn,base,changed


AUTHOR

Marc LeBrun and N. J. A. Sloane, Oct 19 2003


STATUS

approved



