A067285 a(n) = smallest integer k such that k is not of the form m + reverse(m) for any m (cf. A067031) and A067030(n) occurs in the 'Reverse and Add' trajectory of k.

0, 1, 1, 3, 1, 5, 5, 3, 7, 1, 9, 5, 3, 5, 7, 3, 1, 5, 9, 100, 7, 7, 3, 120, 49, 1, 130, 69, 5, 140, 89, 9, 150, 100, 160, 111, 170, 7, 180, 131, 190, 120, 151, 102, 130, 112, 171, 122, 140, 3, 191, 142, 152, 100, 162, 113, 172, 111, 182, 133, 192, 7, 153, 104, 131, 114

Offset

0,4

Comments

a(n) <= A067033(n).

Links

Table of n, a(n) for n=0..65.

Index entries for sequences related to Reverse and Add!

Example

a(14) = 7, since A067030(14) = 55 and the five integers 7, 23, 32, 41, 50 are not of the form m + reverse(m) for any m, 55 occurs in the trajectory of each of them and 7 is the smallest one. a(25) = 1, since A067030(25) = 154 and the eleven integers 1, 25, 34, 43, 52, 59, 61, 68, 70, 86, 95 are not of the form m + reverse(m) for any m, 154 occurs in the trajectory of each of them and 1 is the smallest one.

Crossrefs

Cf. A067030, A067031, A067033, A067284, A067286.

Sequence in context: A244420 A274513 A104489 * A067286 A256615 A201767

Adjacent sequences: A067282 A067283 A067284 * A067286 A067287 A067288

Keyword

base,nonn

Author

Klaus Brockhaus, Feb 04 2002

Status

approved