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 1-10 of 25 results. Next

A031236 Position of n-th 0 in A031235.

Original entry on oeis.org

0, 5, 15, 25, 35, 45, 46, 49, 52, 55, 58, 60, 75, 90, 105, 120, 121, 124, 127, 130, 133, 135, 150, 165, 180, 195, 196, 199, 202, 205, 208, 210, 225, 240, 255, 270, 271, 274, 277, 280, 283, 285, 300, 315, 330, 345, 346, 347, 350, 351
Offset: 1

Views

Author

Clark Kimberling

Keywords

Extensions

a(1)=0 inserted for consistency with change in A031235 by Sean A. Irvine, Apr 17 2020

A031237 Position of n-th 1 in A031235.

Original entry on oeis.org

1, 6, 7, 8, 10, 12, 14, 17, 27, 37, 47, 48, 50, 53, 56, 59, 61, 62, 63, 64, 65, 67, 68, 70, 71, 73, 74, 77, 78, 80, 83, 86, 89, 92, 93, 95, 98, 101, 104, 107, 108, 110, 113, 116, 119, 123, 136, 138, 139, 142, 145, 148, 153, 168, 183, 198
Offset: 1

Views

Author

Clark Kimberling

Keywords

A031238 Position of n-th 2 in A031235.

Original entry on oeis.org

2, 9, 16, 18, 19, 20, 22, 24, 29, 39, 51, 66, 76, 79, 81, 82, 85, 88, 96, 111, 122, 125, 126, 128, 131, 134, 137, 140, 141, 143, 146, 149, 151, 152, 154, 155, 156, 157, 158, 160, 161, 163, 164, 167, 170, 171, 173, 176, 179, 182, 185
Offset: 1

Views

Author

Clark Kimberling

Keywords

A031239 Position of n-th 3 in A031235.

Original entry on oeis.org

3, 11, 21, 26, 28, 30, 31, 32, 34, 41, 54, 69, 84, 91, 94, 97, 99, 100, 103, 114, 129, 144, 159, 166, 169, 172, 174, 175, 178, 189, 197, 200, 203, 204, 206, 209, 212, 215, 218, 219, 221, 224, 227, 230, 233, 234, 236, 239, 241, 242
Offset: 1

Views

Author

Clark Kimberling

Keywords

A031240 Position of n-th 4 in A031235.

Original entry on oeis.org

4, 13, 23, 33, 36, 38, 40, 42, 43, 44, 57, 72, 87, 102, 106, 109, 112, 115, 117, 118, 132, 147, 162, 177, 181, 184, 187, 190, 192, 193, 207, 222, 237, 252, 256, 259, 262, 265, 267, 268, 272, 275, 278, 281, 282, 284, 287, 290, 293
Offset: 1

Views

Author

Clark Kimberling

Keywords

Crossrefs

Cf. A031235.

A031241 a(n)=least k such that base 5 representation of n begins at s(k), where s=A031235.

Original entry on oeis.org

1, 2, 3, 4, 14, 6, 1, 10, 12, 24, 9, 18, 2, 22, 34, 11, 21, 30, 3, 4, 13, 23, 33, 42, 119, 48, 14, 89, 104, 47, 6, 7, 67, 70, 50, 8, 17, 1, 110, 53, 10, 27, 98, 113, 56, 12, 37, 101, 116, 194, 51, 126, 24, 179, 88, 66, 16, 9, 85, 125, 81, 18, 19
Offset: 1

Views

Author

Clark Kimberling

Keywords

A031242 Length of n-th run of digit 0 in A031235.

Original entry on oeis.org

1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1
Offset: 1

Views

Author

Clark Kimberling

Keywords

Comments

Differs from A031226 whenever a base 5 sequence of a number is inserted which has a non-palindromic sequence of run-lengths of 0. Happens first scanning 10010_5 = 630_10 which is inserted in A031235 as 01001 (run lengths 1,2) but in A031219 as 10010 (run lengths 2,1). - R. J. Mathar, Jul 23 2025

Extensions

a(1)=1 inserted for consistency with change in A031235 by Sean A. Irvine, Apr 19 2020

A031243 Length of n-th run of digit 1 in A031235.

Original entry on oeis.org

1, 3, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 5, 2, 2, 2, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 3, 2
Offset: 1

Views

Author

Clark Kimberling

Keywords

A031244 Length of n-th run of digit 2 in A031235.

Original entry on oeis.org

1, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 2, 5, 2, 2, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2
Offset: 1

Views

Author

Clark Kimberling

Keywords

A031245 Length of n-th run of digit 3 in A031235.

Original entry on oeis.org

1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 2, 2, 5, 2, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1
Offset: 1

Views

Author

Clark Kimberling

Keywords

Extensions

a(84) corrected by Sean A. Irvine, Apr 19 2020
Showing 1-10 of 25 results. Next

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.