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 38 results. Next

A031226 Length of n-th run of digit 0 in A031219.

Original entry on oeis.org

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

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A031220 Position of n-th 0 in A031219.

Original entry on oeis.org

6, 16, 26, 36, 46, 47, 49, 52, 55, 58, 62, 77, 92, 107, 121, 122, 124, 127, 130, 133, 137, 152, 167, 182, 196, 197, 199, 202, 205, 208, 212, 227, 242, 257, 271, 272, 274, 277, 280, 283, 287, 302, 317, 332, 346, 347, 348, 350, 351
Offset: 1

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A031221 Position of n-th 1 in A031219.

Original entry on oeis.org

1, 5, 7, 8, 9, 11, 13, 18, 28, 38, 45, 48, 50, 51, 54, 57, 60, 61, 63, 64, 65, 66, 67, 69, 70, 72, 73, 75, 78, 80, 81, 84, 87, 90, 93, 95, 96, 99, 102, 105, 108, 110, 111, 114, 117, 125, 136, 139, 140, 142, 145, 148, 155, 170, 185, 200
Offset: 1

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A031222 Position of n-th 2 in A031219.

Original entry on oeis.org

2, 10, 15, 17, 19, 20, 21, 23, 30, 40, 53, 68, 76, 79, 82, 83, 85, 88, 98, 113, 120, 123, 126, 128, 129, 132, 135, 138, 141, 143, 144, 147, 150, 151, 153, 154, 156, 157, 158, 159, 160, 162, 163, 165, 168, 171, 173, 174, 177, 180
Offset: 1

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A031223 Position of n-th 3 in A031219.

Original entry on oeis.org

3, 12, 22, 25, 27, 29, 31, 32, 33, 42, 56, 71, 86, 91, 94, 97, 100, 101, 103, 116, 131, 146, 161, 166, 169, 172, 175, 176, 178, 191, 195, 198, 201, 204, 206, 207, 210, 213, 216, 219, 221, 222, 225, 228, 231, 234, 236, 237, 240, 241
Offset: 1

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A031224 Position of n-th 4 in A031219.

Original entry on oeis.org

4, 14, 24, 34, 35, 37, 39, 41, 43, 44, 59, 74, 89, 104, 106, 109, 112, 115, 118, 119, 134, 149, 164, 179, 181, 184, 187, 190, 193, 194, 209, 224, 239, 254, 256, 259, 262, 265, 268, 269, 270, 273, 276, 279, 282, 284, 285, 288, 291
Offset: 1

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A031225 a(n)=least k such that base 5 representation of n begins at s(k), where s=A031219.

Original entry on oeis.org

1, 2, 3, 4, 5, 7, 1, 11, 13, 15, 10, 19, 2, 23, 25, 12, 22, 31, 3, 35, 4, 14, 24, 34, 45, 5, 51, 54, 57, 50, 7, 8, 69, 72, 75, 9, 18, 1, 87, 90, 11, 28, 99, 102, 105, 73, 13, 114, 117, 120, 76, 15, 129, 132, 53, 68, 17, 10, 113, 128, 82, 19, 20
Offset: 1

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A031227 Length of n-th run of digit 1 in A031219.

Original entry on oeis.org

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

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A031228 Length of n-th run of digit 2 in A031219.

Original entry on oeis.org

1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 2, 2, 5, 2, 1, 1, 1, 2, 1, 1, 1, 1, 2, 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

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Programs

  • Mathematica
    Length/@(If[MemberQ[#,2],#,Nothing]&/@Split[Flatten[ IntegerDigits[ Range[ 400],5]]]) (* Harvey P. Dale, Dec 19 2021 *)

A031229 Length of n-th run of digit 3 in A031219.

Original entry on oeis.org

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

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Extensions

a(84) corrected by Sean A. Irvine, Apr 16 2020
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