id:A153211 - OEIS Search Results

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Sum of digits of n, times digital reversal of sum of digits of n.

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1, 4, 9, 16, 25, 36, 49, 64, 81, 1, 4, 9, 16, 25, 36, 49, 64, 81, 10, 4, 9, 16, 25, 36, 49, 64, 81, 10, 121, 9, 16, 25, 36, 49, 64, 81, 10, 121, 252, 16, 25, 36, 49, 64, 81, 10, 121, 252, 403, 25, 36, 49, 64, 81, 10, 121, 252, 403, 574, 36, 49, 64, 81, 10, 121, 252, 403, 574 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`The fixed points of this sequence {n such that a(n) = n} are A110921.`
	FORMULA	`a(n) = SOD(n)R(SOD(n)) = A007953(n)A004086(A007953(n)).`
	EXAMPLE	`a(19) = (1+9)R(1+9) = 1001 = 101 = 10. a(79) = 976 because (7+9)R(7+9) = 16*61 = 976.`
	CROSSREFS	`Cf. A004086, A007953, A110921.` `Sequence in context: A003132 A062331 A069940 this_sequence A118881 A098733 A083163` `Adjacent sequences: A153208 A153209 A153210 this_sequence A153212 A153213 A153214`
	KEYWORD	`base,easy,nonn`
	AUTHOR	`Jonathan Vos Post (jvospost3(AT)gmail.com), Dec 20 2008`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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