A321997 Numbers that cannot be written using seven 7's and operations +, -, * and/or /. Complement of A258068.

38, 66, 67, 68, 73, 74, 75, 76, 79, 80, 81, 87, 88, 108, 109, 115, 116, 117, 118, 121, 122, 123, 124, 125, 127, 128, 129, 130, 131, 132, 134, 135, 136, 137, 138, 142, 143, 151, 152, 156, 157, 158, 159, 160, 162, 163, 164, 165, 166, 167, 169, 170, 173, 174, 176, 177, 178, 179

Offset

1,1

Comments

A258068 contains most nonnegative integers below 115, which motivates listing the complement, even though A258068 is finite and its complement, this sequence, contains all integers above 134456 except for 235298 and 823543. (These are the last three terms of A258068.)

Links

Table of n, a(n) for n=1..58.

Crossrefs

Cf. A258068 (complement), A171826, A171827, A171828, A171829, A258069, A258070, A258071 (analog for 3, ..., 10).

Cf. A182002, A258097.

Sequence in context: A039466 A216140 A177044 * A343974 A335483 A071885

Adjacent sequences: A321994 A321995 A321996 * A321998 A321999 A322000

Keyword

nonn

Author

M. F. Hasler, Nov 23 2018

Status

approved