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 10 results.

A030364 Position of n-th 0 in A030363.

Original entry on oeis.org

4, 14, 16, 20, 21, 24, 25, 31, 32, 52, 53, 56, 58, 61, 65, 70, 75, 81, 82, 83, 88, 91, 92, 93, 94, 96, 100, 101, 110, 111, 115, 119, 120, 125, 126, 128, 131, 134, 136, 139, 140, 146, 147, 150, 151, 156, 159, 164, 166, 172, 176, 178, 180
Offset: 1

Views

Author

Clark Kimberling

Keywords

Crossrefs

Cf. A030363.

A030365 Position of n-th 1 in A030363.

Original entry on oeis.org

1, 3, 5, 9, 10, 11, 13, 15, 18, 22, 23, 28, 30, 35, 38, 39, 40, 45, 46, 47, 49, 50, 51, 54, 59, 62, 63, 64, 66, 67, 71, 72, 76, 78, 80, 85, 86, 89, 95, 103, 107, 108, 109, 114, 116, 118, 121, 123, 124, 127, 130, 137, 141, 142, 143, 144, 148
Offset: 1

Views

Author

Clark Kimberling

Keywords

Crossrefs

Cf. A030363.

A030366 Position of n-th 2 in A030363.

Original entry on oeis.org

2, 6, 7, 8, 12, 17, 19, 26, 27, 29, 33, 34, 36, 37, 41, 42, 43, 44, 48, 55, 57, 60, 68, 69, 73, 74, 77, 79, 84, 87, 90, 97, 98, 99, 102, 104, 105, 106, 112, 113, 117, 122, 129, 132, 133, 135, 138, 145, 152, 153, 154, 157, 158, 160, 162
Offset: 1

Views

Author

Clark Kimberling

Keywords

A030367 a(n) is the least k such that the base-3 representation of n begins at s(k), where s=A030363.

Original entry on oeis.org

1, 2, 3, 9, 1, 19, 2, 6, 23, 3, 15, 22, 9, 10, 18, 1, 5, 19, 57, 55, 2, 8, 17, 68, 7, 6, 80, 51, 23, 13, 64, 3, 223, 15, 95, 22, 63, 318, 49, 141, 9, 85, 10, 39, 18, 59, 54, 1, 47, 76, 67, 35, 5, 90, 19, 99, 175, 60, 57, 55, 158, 417, 29, 2, 129
Offset: 1

Views

Author

Clark Kimberling

Keywords

Crossrefs

Cf. A030363.

Extensions

a(33) onward corrected by Sean A. Irvine, Mar 31 2020

A030368 Length of n-th run of digit 0 in A030363.

Original entry on oeis.org

1, 1, 1, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 3, 1, 4, 1, 2, 2, 1, 2, 2, 1, 1, 1, 1, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 1, 1, 2, 4, 1, 1, 1, 2, 1, 1, 1, 1, 3, 2, 1, 2, 2, 2, 3, 2, 1, 3, 1, 1, 4, 2, 1, 1, 2, 3, 1, 1, 1, 3, 1, 2, 3, 1, 2, 1, 1, 2, 2, 1, 1, 1, 1, 1, 2, 1, 2
Offset: 1

Views

Author

Clark Kimberling

Keywords

A030369 Length of n-th run of digit 1 in A030363.

Original entry on oeis.org

1, 1, 1, 3, 1, 1, 1, 2, 1, 1, 1, 3, 3, 3, 1, 1, 3, 2, 2, 1, 1, 1, 2, 1, 1, 1, 3, 1, 1, 1, 1, 2, 1, 1, 1, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 3, 2, 2, 2, 1, 1, 1, 4, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 3, 1, 1, 3, 2, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 2, 1
Offset: 1

Views

Author

Clark Kimberling

Keywords

A030370 Length of n-th run of digit 2 in A030363.

Original entry on oeis.org

1, 3, 1, 1, 1, 2, 1, 2, 2, 4, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 1, 3, 1, 3, 2, 1, 1, 1, 2, 1, 1, 1, 3, 2, 1, 1, 2, 1, 3, 1, 1, 1, 3, 1, 1, 1, 2, 1, 1, 2, 1, 2, 1, 1, 2, 2, 1, 1, 3, 1, 1, 1, 1, 1, 5, 2, 2, 4, 1, 1, 2, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 3, 2, 1, 1, 1, 1, 1, 2, 1
Offset: 1

Views

Author

Clark Kimberling

Keywords

Crossrefs

Cf. A030363.

A030371 a(n)=(# 1's)-(# 0's) in first n terms of A030363.

Original entry on oeis.org

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

Views

Author

Clark Kimberling

Keywords

Programs

  • Mathematica
    Accumulate[Flatten[IntegerDigits[Fibonacci[Range[2,30]],3]]/.{0->-1,2->0}] (* Harvey P. Dale, Jan 16 2020 *)

A030372 (# 1's)-(# 2's) in first n terms of A030363.

Original entry on oeis.org

1, 0, 1, 1, 2, 1, 0, -1, 0, 1, 2, 1, 2, 2, 3, 3, 2, 3, 2, 2, 2, 3, 4, 4, 4, 3, 2, 3, 2, 3, 3, 3, 2, 1, 2, 1, 0, 1, 2, 3, 2, 1, 0, -1, 0, 1, 2, 1, 2, 3, 4, 4, 4, 5, 4, 4, 3, 3, 4, 3, 3, 4, 5, 6, 6, 7, 8, 7, 6, 6, 7, 8, 7, 6, 6, 7, 6, 7, 6, 7, 7, 7, 7, 6, 7, 8, 7, 7, 8, 7
Offset: 1

Views

Author

Clark Kimberling

Keywords

Crossrefs

Cf. A030363.

A031111 Write the (n+1)st Fibonacci number in base 9 and juxtapose.

Original entry on oeis.org

1, 2, 3, 5, 8, 1, 4, 2, 3, 3, 7, 6, 1, 1, 0, 8, 1, 7, 0, 2, 7, 8, 4, 5, 8, 7, 4, 7, 1, 3, 1, 6, 2, 1, 6, 4, 3, 4, 8, 1, 5, 6, 5, 5, 1, 0, 2, 4, 6, 1, 6, 0, 1, 2, 2, 6, 2, 5, 8, 4, 3, 2, 7, 1, 7, 0, 5, 4, 0, 1, 2, 3, 8, 2, 1, 2, 0, 4, 4, 6, 1, 3, 2, 8, 3, 8, 2, 5, 3, 3
Offset: 1

Views

Author

Clark Kimberling

Keywords

Examples

			A004692(25..28) = 123821, 204461, 328382, 533853. - _Georg Fischer_, Jun 21 2019

Links

Crossrefs

Cf. A004692 (Fibonacci numbers written in base 9).
Similar sequences in base 3 (A030363), 4 (A030413), 6 (A030604), 7 (A031027), 8 (A031067), 5 (A031269).

Programs

  • Magma
    &cat[Reverse(Intseq(Fibonacci(k),9)):k in [2..28]]; // Marius A. Burtea, Jun 21 2019
  • Mathematica
    Flatten[IntegerDigits[#,9]&/@Fibonacci[Range[30]]] (* Harvey P. Dale, Jan 13 2024 *)

Extensions

a(88)-a(90) corrected by Georg Fischer, Jun 21 2019
Showing 1-10 of 10 results.

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