The On-Line Encyclopedia of Integer Sequences (OEIS)

A377460 revision #15

A377460

Numbers that cannot be generated from the box stacking described below.

11, 31, 49, 62, 73, 82, 83, 85, 92, 119, 125, 139, 145, 151, 157, 167, 173, 179, 199, 221, 223, 238, 245, 247, 250, 251, 255, 257, 262, 263, 265, 278, 284, 295, 328, 332, 359, 389, 406, 413, 433, 445, 461, 467, 471, 487, 491, 494, 509, 515, 523, 530, 533, 539

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OFFSET

1,1

COMMENTS

Boxes on the bottom row are labeled 1.

Boxes not on the bottom row must be supported directly below, and are labeled as the sum of the 2 or 3 boxes they are directly above, including diagonally.

LINKS

Table of n, a(n) for n=1..54.

EXAMPLE

The first 9 numbers can be generated like this:

1 2 3 4 5 6 7 8 9

11 111 22 23 33 232 233 333

11 111 1111 111 1111 11111

CROSSREFS

Sequence in context: A043124 A043904 A152293 * * A031287 A230329

Adjacent sequences: A377455 A377456 A377457 * A377462 A377463 A377464

KEYWORD

nonn

AUTHOR

Erich Friedman, Oct 29 2024

EXTENSIONS

a(38)-a(54) from Alois P. Heinz, Oct 30 2024

STATUS

proposed