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A081365
Numbers whose name in American English is a word-palindrome, reading the same forward and backward.
0
101, 202, 303, 404, 505, 606, 707, 808, 909, 1001, 2002, 3003, 4004, 5005, 6006, 7007, 8008, 9009, 10010, 11011, 12012, 13013, 14014, 15015, 16016, 17017, 18018, 19019, 20020, 21021, 22022, 23023, 24024, 25025, 26026, 27027, 28028, 29029, 30030, 31031, 32032
OFFSET
1,1
COMMENTS
The sequence considers hyphenated names (for non-multiples of 10 between 21 and 99) and treats those as single words, hence, "twenty-one thousand twenty-one" is a term. Indeed, all numbers of the form k*10^(3*i) + k for 1 <= k <= 99 and i > 0 are terms. - Michael S. Branicky, Jun 19 2024
REFERENCES
M. J. Halm, More Sequences, Mpossibilities 83, April 2003.
EXAMPLE
a(1) = 101 because "one hundred one" is the first number name which is a word palindrome.
CROSSREFS
Sequence in context: A162670 A252664 A134970 * A138131 A069858 A357033
KEYWORD
easy,nonn,word
AUTHOR
Michael Joseph Halm, Apr 20 2003
EXTENSIONS
Name edited and data corrected by Michael S. Branicky, Jun 19 2024
STATUS
approved