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A367611
Numbers that are not the comma-child of any positive number.
1
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 13, 14, 15, 16, 17, 18, 19, 20, 21, 25, 26, 27, 28, 29, 30, 31, 32, 37, 38, 39, 40, 41, 42, 43, 49, 50, 51, 52, 53, 54, 62, 63, 64, 65, 74, 75, 76, 86, 87, 98
OFFSET
1,2
COMMENTS
A subsequence of A367600.
This 50-term sequence was found by David W. Wilson in 2007. See the Eric Angelini link.
See A367338 for definition of comma-child.
LINKS
Eric Angelini, The Commas Sequence, Message to Sequence Fans, Sep 06 2016. [Cached copy, with permission]
Eric Angelini, Michael S. Branicky, Giovanni Resta, N. J. A. Sloane, and David W. Wilson, The Comma Sequence: A Simple Sequence With Bizarre Properties, arXiv:2401.14346, Youtube
PROG
(Python)
def ok(n): y = int(str(n)[0]); x = (n-y)%10; return n - y - 10*x < 1
print([k for k in range(1, 99) if ok(k)]) # Michael S. Branicky, Dec 15 2023
CROSSREFS
A367612 gives the complement.
Sequence in context: A302028 A367600 A023779 * A247812 A050724 A336813
KEYWORD
nonn,base,fini,full
AUTHOR
STATUS
approved