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.

Previous Showing 11-19 of 19 results.

A030613 Length of n-th run of digit 1 in A030604.

Original entry on oeis.org

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

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Author

Clark Kimberling

Keywords

Extensions

Title corrected and a(1) corrected for consistency with change in A030604 by Sean A. Irvine, Apr 04 2020

A030614 Length of n-th run of digit 2 in A030604.

Original entry on oeis.org

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

Views

Author

Clark Kimberling

Keywords

Extensions

Title corrected by Sean A. Irvine, Apr 04 2020

A030615 Length of n-th run of digit 3 in A030604.

Original entry on oeis.org

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

Views

Author

Clark Kimberling

Keywords

Extensions

Title corrected by Sean A. Irvine, Apr 04 2020

A030616 Length of n-th run of digit 4 in A030604.

Original entry on oeis.org

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

Views

Author

Clark Kimberling

Keywords

Extensions

Title corrected by Sean A. Irvine, Apr 04 2020

A030617 a(n)=(# 1's)-(# 0's) in first n terms of A030604.

Original entry on oeis.org

1, 1, 1, 1, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 5, 5, 5, 5, 5, 4, 3, 4, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 6, 6, 6, 7, 8, 8, 8, 8, 8, 8, 9, 9, 8, 8, 8, 9, 10, 10, 10, 11, 11, 11, 11, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 10, 10, 10, 10, 10
Offset: 1

Views

Author

Clark Kimberling

Keywords

A030618 (# 1's)-(# 2's) in first n terms of A030604.

Original entry on oeis.org

1, 0, 0, 0, 1, 0, -1, 0, 0, 0, 0, 0, 1, 1, 2, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, -1, -1, -1, -1, -1, -1, -2, -2, -1, 0, -1, -2, -1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 2, 2, 2, 3, 2, 1, 1, 1, 0, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2
Offset: 1

Views

Author

Clark Kimberling

Keywords

A030619 a(n) = (# 2's)-(# 3's) in first n terms of A030604.

Original entry on oeis.org

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

Views

Author

Clark Kimberling

Keywords

Crossrefs

Cf. A030604.

Programs

  • Mathematica
    Accumulate[Which[#==2,1,#==3,-1,True,0]&/@Flatten[IntegerDigits[#,6]&/@ Fibonacci[Range[2,30]]]] (* Harvey P. Dale, Feb 08 2015 *)

A030620 a(n)=(# 3's)-(# 4's) in first n terms of A030604.

Original entry on oeis.org

0, 0, 1, 1, 1, 1, 1, 1, 2, 3, 3, 2, 2, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 0, 0, -1, -2, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, -2, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, -1, -1, -1, -1, -1, 0, 0, 0, 0, 1, 0, 0, -1, -1, -1, -1, -1, -2
Offset: 1

Views

Author

Clark Kimberling

Keywords

Programs

  • Mathematica
    Accumulate[Which[#==3,1,#==4,-1,True,0]&/@Flatten[IntegerDigits[#,6]&/@ Fibonacci[Range[2,30]]]] (* Harvey P. Dale, Jun 22 2017 *)

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
Previous Showing 11-19 of 19 results.

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