id:A055616 - OEIS Search Results

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Numbers with 2*n digits which are the sum of the squares of their n-digit halves (leading zeros allowed only for the second half).

+0
5

1233, 8833, 990100, 94122353, 1765038125, 2584043776, 7416043776, 8235038125, 9901009901, 116788321168, 123288328768, 876712328768, 883212321168, 999900010000, 13793103448276, 15348303604525 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`The sequence is infinite since it contains several infinite subsequences (see A055617, etc.).` `If x = A10^n+B is an element not beginning with 9, then (10^n-A)10^n+B is another (e.g. 1233 <-> 8833)`
	EXAMPLE	`8833 is ok, since 8833 = 88^2 + 33^2`
	CROSSREFS	`Cf. A064942 for the number of solutions, where leading zeros are allowed, A055617-A055619.` `Cf. A055617-A055619.` `Sequence in context: A038813 A064942 A101311 this_sequence A104971 A091332 A122043` `Adjacent sequences: A055613 A055614 A055615 this_sequence A055617 A055618 A055619`
	KEYWORD	`nonn,base`
	AUTHOR	`Ulrich Schimke (ulrschimke(AT)aol.com)`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

AT&T Labs Research