A015976 - OEIS

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A015976

One iteration of Reverse and Add is needed to reach a palindrome.

1, 2, 3, 4, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 21, 22, 23, 24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36, 38, 40, 41, 42, 43, 44, 45, 47, 50, 51, 52, 53, 54, 56, 60, 61, 62, 63, 65, 70, 71, 72, 74, 80, 81, 83, 90, 92, 100, 101, 102, 103, 104, 105, 106 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	COMMENTS	`The number of iterations starts at 1, so palindromes (cf. A002113) are not excluded. The corresponding sequence excluding palindromes is A065206.`
	LINKS	`Reinhard Zumkeller, Table of n, a(n) for n = 1..10000` `Index entries for sequences related to Reverse and Add!`
	PROG	`(Haskell)` `a015976 n = a015976_list !! (n-1)` `a015976_list = filter ((== 1) . a136522 . a056964) [1..]` `-- Reinhard Zumkeller, Oct 14 2011`
	CROSSREFS	`Cf. A002113, A065206.` `Sequence in context: A193858 A054930 A119798 * A098892 A174139 A037325` `Adjacent sequences: A015973 A015974 A015975 * A015977 A015978 A015979`
	KEYWORD	`nonn,base`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com)`
	EXTENSIONS	`Offset corrected by Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 14 2011`

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Last modified February 12 21:29 EST 2012. Contains 205433 sequences.