A171827 -id:A171827 - cp's OEIS frontend

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

M. F. Hasler, Nov 23 2018

nonn

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.)

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

Cf. A182002, A258097.

A321998 Numbers that cannot be written using eight 8's and operations +, -, * and/or /. Complement of A258069.

Original entry on oeis.org

91, 93, 101, 107, 109, 115, 141, 147, 149, 155, 157, 163, 166, 173, 174, 178, 179, 205, 206, 210, 211, 214, 218, 221, 222, 223, 226, 227, 229, 230, 231, 233, 234, 235, 236, 237, 243, 245, 251, 261, 267, 269, 275, 276, 277, 278, 279, 281, 282, 283, 285, 286, 287, 290, 291

Offset: 1

M. F. Hasler, Nov 23 2018

nonn

A258069 contains all nonnegative integers up to 90, which motivates to list the complement, even though A258069 is finite and its complement, this sequence, contains all integers above 2359296 except for 4194304 and 16777216. (These are the last three terms of A258069.)

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

Cf. A182002, A258097.

cp's OEIS Frontend

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

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