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A008920 Let j = | i - i_written_backwards |, k = j + j_written_backwards; then k is in this sequence. 0
0, 18, 99, 198, 261, 342, 423, 504, 585, 666, 747, 828, 1089, 1170, 1251, 1332, 1413, 1494, 1575, 1656, 1737, 1818, 1998, 2871, 3762, 4653, 5544, 6435, 7326, 8217, 9108, 9999, 10890, 10989, 11781, 12672, 13563, 14454, 15345, 16236 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

J. H. Conway, personal communication.

LINKS

Table of n, a(n) for n=0..39.

CROSSREFS

Sequence in context: A177371 A044269 A044650 * A221911 A263999 A087638

Adjacent sequences:  A008917 A008918 A008919 * A008921 A008922 A008923

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane and J. H. Conway

STATUS

approved

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Last modified July 24 12:47 EDT 2021. Contains 346273 sequences. (Running on oeis4.)