cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-4 of 4 results.

A191263 Positions of 1 in A191261.

Original entry on oeis.org

2, 7, 9, 11, 13, 18, 23, 28, 33, 35, 37, 39, 44, 46, 48, 50, 55, 57, 59, 61, 66, 68, 70, 72, 77, 82, 87, 92, 94, 96, 98, 103, 108, 113, 118, 120, 122, 124, 129, 134, 139, 144, 146, 148, 150, 155, 160, 165, 170, 172, 174, 176, 181, 183, 185, 187, 192, 194, 196, 198, 203, 205, 207, 209, 214, 219, 224, 229, 231, 233, 235, 240, 242, 244
Offset: 1

Views

Author

Clark Kimberling, May 28 2011

Keywords

Comments

Also, positions of 1 in the fixed point of the morphism 0->01, 1>000; see A284745. - Clark Kimberling, Apr 13 2017

Crossrefs

Programs

  • Mathematica
    s = Nest[Flatten[# /. {0 -> {0, 1}, 1 -> {0, 0, 0}}] &, {0}, 13]; (* A284745 *)
    Flatten[Position[s, 0]];  (* A284746 *)
    Flatten[Position[s, 1]];  (* A191263 *)

A191262 Positions of 0 in A191261.

Original entry on oeis.org

1, 3, 4, 6, 8, 10, 12, 14, 15, 17, 19, 20, 22, 24, 25, 27, 29, 30, 32, 34, 36, 38, 40, 41, 43, 45, 47, 49, 51, 52, 54, 56, 58, 60, 62, 63, 65, 67, 69, 71, 73, 74, 76, 78, 79, 81, 83, 84, 86, 88, 89, 91, 93, 95, 97, 99, 100, 102, 104, 105, 107, 109, 110, 112, 114, 115, 117, 119, 121, 123, 125, 126, 128, 130, 131, 133, 135, 136, 138, 140, 141
Offset: 1

Views

Author

Clark Kimberling, May 28 2011

Keywords

Comments

See A191261 and A191250.

Crossrefs

Programs

A191264 Positions of 2 in A191261.

Original entry on oeis.org

5, 16, 21, 26, 31, 42, 53, 64, 75, 80, 85, 90, 101, 106, 111, 116, 127, 132, 137, 142, 153, 158, 163, 168, 179, 190, 201, 212, 217, 222, 227, 238, 249, 260, 271, 276, 281, 286, 297, 308, 319, 330, 335, 340, 345, 356, 367, 378, 389, 394, 399, 404, 415, 420, 425, 430, 441, 446, 451, 456, 467, 472, 477, 482, 493, 504
Offset: 1

Views

Author

Clark Kimberling, May 28 2011

Keywords

Comments

See A191261.

Crossrefs

Programs

A191250 Fixed point of the morphism 0 -> 01, 1 -> 02, 2 -> 001.

Original entry on oeis.org

0, 1, 0, 2, 0, 1, 0, 0, 1, 0, 1, 0, 2, 0, 1, 0, 1, 0, 2, 0, 1, 0, 2, 0, 1, 0, 0, 1, 0, 1, 0, 2, 0, 1, 0, 2, 0, 1, 0, 0, 1, 0, 1, 0, 2, 0, 1, 0, 0, 1, 0, 1, 0, 2, 0, 1, 0, 1, 0, 2, 0, 1, 0, 2, 0, 1, 0, 0, 1, 0, 1, 0, 2, 0, 1, 0, 0, 1, 0, 1, 0, 2, 0, 1, 0, 1, 0, 2, 0, 1, 0, 2, 0, 1, 0, 0, 1, 0, 1, 0, 2, 0, 1, 0, 1, 0, 2, 0, 1, 0, 2, 0, 1, 0, 0, 1, 0, 1, 0, 2, 0, 1, 0, 2, 0, 1, 0, 0, 1, 0, 1, 0
Offset: 1

Views

Author

Clark Kimberling, May 28 2011

Keywords

Comments

A few 3-substitution sequences:
A191250: 0 -> 01, 1 -> 02, 2 -> 001
A191254: 0 -> 01, 1 -> 02, 2 -> 01
A191255: 0 -> 01, 1 -> 02, 2 -> 03, 3 -> 01
A191258: 0 -> 01, 1 -> 02, 2 -> 03, 3 -> 001
A191261: 0 -> 01, 1 -> 002, 2 -> 01
A191265: 0 -> 001, 1 -> 002, 2 -> 01
A191269: 0 -> 001, 1 -> 02, 2 -> 01
See also A189576 and A189628.

Crossrefs

Programs

  • Mathematica
    t = Nest[Flatten[# /. {0 -> {0, 1}, 1 -> {0, 2}, 2 -> {0, 0, 1}}] &, {0},8]  (* A191250 *)
    Flatten[Position[t, 0]]  (* A191251 *)
    Flatten[Position[t, 1]]  (* A191252 *)
    Flatten[Position[t, 2]]  (* A191253 *)
Showing 1-4 of 4 results.