A194429 - OEIS

A194429

Numbers n such that there is no i >= 0 for which A053392(i) = n.

110, 120, 121, 130, 131, 132, 140, 141, 142, 143, 150, 151, 152, 153, 154, 160, 161, 162, 163, 164, 165, 170, 171, 172, 173, 174, 175, 176, 180, 181, 182, 183, 184, 185, 186, 187, 190, 191, 192, 193, 194, 195, 196, 197, 198, 220, 230, 231, 240, 241, 242, 250, 251, 252, 253, 260, 261, 262, 263, 264, 270, 271, 272, 273, 274, 275, 280, 281

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

The Friedman web site quotes B. J. van der Zwaag as saying that the three-digit terms are those for which the middle digit is >= the sum of the other two digits.

LINKS

Table of n, a(n) for n=1..68.

Erich Friedman, Problem of the Month (February 2000).

CROSSREFS

Cf. A053392.

Sequence in context: A279421 A135642 A166323 * A320121 A084042 A110735

Adjacent sequences: A194426 A194427 A194428 * A194430 A194431 A194432

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, Aug 24 2011

STATUS

approved