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 15 results. Next

A031265 a(n)=(# 1's)-(# 0's) in first n terms of A031253.

Original entry on oeis.org

1, 1, 2, 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 4, 4, 4, 5, 4, 3, 4, 3, 3, 4, 3, 3, 4, 5, 6, 7, 8, 8, 9, 9, 8, 9, 9, 9, 10, 10, 10, 11, 11, 12, 13, 13, 13, 14, 14, 13, 14, 14, 14, 15, 15, 15, 15, 14, 15, 15, 14, 14, 14, 15, 14, 14, 15, 15, 15, 16
Offset: 1

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Programs

  • Mathematica
    Accumulate[Flatten[Table[IntegerDigits[2n-1,5]/.{0->-1,2->0,3->0,4->0},{n,60}]]] (* Harvey P. Dale, Jan 14 2024 *)

A031254 Position of n-th 0 in A031253.

Original entry on oeis.org

4, 14, 24, 25, 27, 30, 40, 55, 63, 66, 70, 85, 99, 100, 102, 105, 115, 130, 138, 141, 145, 160, 174, 175, 176, 178, 179, 182, 183, 186, 190, 194, 196, 198, 202, 206, 210, 214, 216, 218, 222, 227, 231, 236, 256, 275, 276, 279, 283
Offset: 1

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A031255 Position of n-th 1 in A031253.

Original entry on oeis.org

1, 3, 5, 7, 10, 20, 23, 26, 29, 32, 33, 34, 35, 36, 38, 41, 44, 47, 49, 50, 53, 56, 59, 64, 69, 72, 75, 79, 94, 108, 109, 111, 124, 139, 144, 147, 150, 154, 169, 173, 177, 181, 185, 187, 188, 189, 191, 193, 197, 201, 205, 208, 209, 213
Offset: 1

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A031256 Position of n-th 2 in A031253.

Original entry on oeis.org

6, 9, 11, 16, 28, 39, 42, 43, 45, 58, 62, 65, 68, 71, 73, 74, 77, 78, 80, 81, 83, 86, 88, 89, 92, 95, 103, 114, 117, 118, 120, 133, 148, 153, 156, 163, 180, 195, 199, 200, 203, 220, 240, 247, 251, 260, 274, 278, 280, 282, 286, 290, 294
Offset: 1

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A031257 Position of n-th 3 in A031253.

Original entry on oeis.org

2, 12, 13, 15, 17, 22, 37, 48, 51, 52, 67, 82, 84, 87, 90, 97, 98, 101, 104, 107, 110, 112, 113, 116, 119, 122, 123, 125, 126, 127, 128, 131, 134, 142, 157, 159, 162, 165, 172, 192, 207, 211, 212, 232, 252, 255, 259, 263, 272, 292
Offset: 1

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Crossrefs

Cf. A031253.

A031258 Position of n-th 4 in A031253.

Original entry on oeis.org

8, 18, 19, 21, 31, 46, 54, 57, 60, 61, 76, 91, 93, 96, 106, 121, 129, 132, 135, 136, 137, 140, 143, 146, 149, 151, 152, 155, 158, 161, 164, 166, 167, 168, 170, 171, 184, 204, 215, 219, 223, 224, 244, 264, 267, 271, 284, 304, 315
Offset: 1

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A031259 a(n)=least k such that base 5 representation of n begins at s(k), where s=A031253.

Original entry on oeis.org

1, 6, 2, 8, 3, 32, 5, 1, 7, 39, 6, 42, 11, 45, 13, 2, 15, 12, 17, 54, 19, 8, 21, 18, 23, 3, 26, 205, 29, 188, 32, 238, 35, 242, 38, 5, 41, 10, 44, 254, 1, 258, 50, 262, 53, 243, 7, 20, 59, 274, 39, 278, 65, 282, 28, 240, 9, 290, 6, 294, 42, 298
Offset: 1

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A031260 Length of n-th run of digit 0 in A031253.

Original entry on oeis.org

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

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Crossrefs

Cf. A031253.

A031261 Length of n-th run of digit 1 in A031253.

Original entry on oeis.org

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

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A031262 Length of n-th run of digit 2 in A031253.

Original entry on oeis.org

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

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Showing 1-10 of 15 results. Next