id:A065816 - OEIS Search Results

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Alternating sum of digits of n^2 = 0.

+0
1

11, 22, 33, 55, 66, 88, 99, 110, 121, 132, 165, 198, 209, 220, 231, 242, 264, 319, 330, 374, 385, 429, 451, 462, 484, 495, 506, 517, 528, 550, 561, 583, 605, 616, 649, 660, 671, 682, 715, 737, 748, 814, 836, 847, 880, 891, 902, 913, 924, 935, 957, 990 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	`f[n_] := Block[ {d = Reverse[ IntegerDigits[ n]], k = l = 1, s = 0}, l = Length[d]; While[ k <= l, s = s - (-1)^k*d[[k]]; k++ ]; Return[s]]; Select[ Range[10^3], f[ #^2] == 0 & ]`
	CROSSREFS	`Cf. A065796.` `Sequence in context: A059544 A070022 A004940 this_sequence A101145 A109016 A084025` `Adjacent sequences: A065813 A065814 A065815 this_sequence A065817 A065818 A065819`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Dec 06 2001`

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Last modified September 7 14:45 EDT 2008. Contains 143483 sequences.

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