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 24 results. Next

A022297 Index of n-th 1 in A006928.

Original entry on oeis.org

1, 3, 4, 6, 9, 12, 13, 15, 16, 19, 21, 22, 24, 27, 28, 30, 31, 33, 36, 39, 40, 42, 45, 47, 48, 50, 51, 54, 57, 58, 60, 63, 66, 67, 69, 70, 72, 75, 77, 78, 81, 84, 85, 87, 90, 93, 94, 96, 97, 100, 102, 103, 105, 108, 111, 112, 114, 115, 117, 120, 121, 123, 124
Offset: 1

Views

Author

Clark Kimberling

Keywords

Comments

a(n) = A013947(n)-1 for n > 1.

Crossrefs

Cf. A006928, A013947.

Extensions

Offset changed to 1 by Sean A. Irvine, May 14 2019

A025505 Index of n-th 2 in A006928.

Original entry on oeis.org

2, 5, 7, 8, 10, 11, 14, 17, 18, 20, 23, 25, 26, 29, 32, 34, 35, 37, 38, 41, 43, 44, 46, 49, 52, 53, 55, 56, 59, 61, 62, 64, 65, 68, 71, 73, 74, 76, 79, 80, 82, 83, 86, 88, 89, 91, 92, 95, 98, 99, 101, 104, 106, 107, 109, 110, 113, 116, 118, 119, 122, 125, 126, 128, 131, 134, 135
Offset: 1

Views

Author

David W. Wilson

Keywords

A025506 Least k such that first k terms of A006928 contain n more 1's than 2's.

Original entry on oeis.org

2, 1, 4, 31, 256, 797, 824, 857, 1126, 1397, 1496, 1523, 1532, 193139, 193172, 194035, 194044, 195377, 196370, 196379, 198570, 198633, 199148, 199553, 199860, 200285, 201758, 201785, 201794, 205329, 205686, 205713, 205806, 206031, 206064, 206091
Offset: 0

Views

Author

David W. Wilson

Keywords

Comments

a(n)=i => i is the smallest index such that A088568(i)=n. Because the difference between successive elements of A088568 can only be -1 or 1, the sequence is monotonic increasing except for a(1) < a(0). - Paolo Bonzini, Jul 06 2016

Examples

			 A088568 begins with 1,0,1,2.. 0 appears first at index 2, 1 appears first at index 1, 2 appears first at index 4. - _Paolo Bonzini_, Jul 06 2016

Links

Crossrefs

Cf. A006928, A025507, A088568, A274775.

Extensions

Edited by N. J. A. Sloane, Aug 11 2016

A025507 Least k such that the first k terms of A006928 contain n more 2's than 1's.

Original entry on oeis.org

11, 92, 377, 470, 6351, 6968, 7175, 7268, 7565, 7970, 20337, 20370, 21981, 22008, 25637, 25664, 25691, 27968, 39183, 39210, 42397, 43128, 43149, 48636, 48729, 48756, 49013, 49040, 49067, 49094, 49863, 50080, 50089, 50386, 50413, 50958, 51343, 52242
Offset: 1

Views

Author

David W. Wilson

Keywords

Comments

a(n)=i => i is the smallest index such that A088568(i)=-n. - Paolo Bonzini, Jul 06 2016.

Links

Crossrefs

Cf. A006928, A088568, A025506, A274775.

A274775 Indices in A006928 where the imbalance between 1's and 2's sets a new record.

Original entry on oeis.org

1, 2, 4, 11, 31, 92, 256, 377, 470, 797, 824, 857, 1126, 1397, 1496, 1523, 1532, 6351, 6968, 7175, 7268, 7565, 7970, 20337, 20370, 21981, 22008, 25637, 25664, 25691, 27968, 39183, 39210, 42397, 43128, 43149, 48636, 48729, 48756, 49013, 49040, 49067, 49094, 49863
Offset: 1

Views

Author

Paolo Bonzini, Jul 06 2016

Keywords

Comments

Indices in A088568 where new values appear.
Sorted union of A025507 and A025506.

Links

Crossrefs

Cf. A006928, A025507, A088568, A025506

A022298 Exactly half of first n terms of A006928 are 1's (not known to be infinite).

Original entry on oeis.org

2, 8, 10, 12, 14, 18, 20, 26, 38, 44, 46, 56, 62, 64, 66, 68, 74, 76, 80, 82, 84, 86, 88, 90, 94, 96, 98, 100, 102, 104, 106, 108, 112, 114, 116, 118, 120, 122, 126, 128, 138, 144, 146, 150, 152, 154, 156, 158, 162, 164, 166, 168, 170, 172, 174, 176, 180, 182, 188, 206
Offset: 0

Views

Author

Clark Kimberling

Keywords

A025508 Least k>1 such that first n terms of A006928 repeat beginning at k-th term.

Original entry on oeis.org

3, 4, 4, 13, 13, 19, 19, 19, 19, 28, 28, 28, 28, 28, 28, 100, 100, 405, 405, 405, 405, 405, 405, 405, 608, 608, 608, 608, 608, 608, 608, 608, 608, 608, 608, 608, 608, 1096, 1096, 1096, 1096, 1096, 1096, 1096, 1096, 1096, 1096, 1096, 1096, 1096, 1096, 1096, 1096
Offset: 1

Views

Author

David W. Wilson

Keywords

A025509 Least k>1 such that reverse of first n terms of A006928 repeats beginning at k-th term.

Original entry on oeis.org

3, 2, 4, 3, 2, 19, 18, 17, 16, 41, 149, 148, 147, 146, 145, 225, 224, 223, 222, 221, 220, 219, 218, 217, 377, 376, 375, 577, 576, 575, 574, 573, 572, 571, 570, 569, 568, 567, 566, 565, 564, 563, 7697, 7696, 7695, 7694, 7693, 7692, 7691, 7690, 7689, 7688, 7687, 7686
Offset: 1

Views

Author

David W. Wilson

Keywords

A025510 Least k>1 such that complement of first n terms of A006928 repeats beginning at k-th term.

Original entry on oeis.org

2, 2, 5, 5, 5, 5, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 150, 150, 150, 912, 912, 912, 912, 912, 912, 912, 912, 912, 912, 912, 912, 912, 912, 912, 912, 912, 912, 912, 912, 912, 912, 912, 912, 912, 912, 912, 912, 912, 912, 1641, 1641, 1641
Offset: 1

Views

Author

David W. Wilson

Keywords

A025511 Least k>1 such that reverse complement of first n terms of A006928 repeats beginning at k-th term.

Original entry on oeis.org

2, 4, 5, 7, 6, 5, 4, 3, 2, 28, 27, 26, 25, 24, 23, 61, 60, 344, 343, 342, 341, 340, 339, 338, 337, 336, 335, 334, 333, 332, 331, 330, 329, 328, 327, 326, 325, 871, 870, 869, 868, 867, 866, 865, 864, 863, 862, 861, 860, 859, 858, 857, 856, 855, 854, 853, 852, 851, 850, 849
Offset: 1

Views

Author

David W. Wilson

Keywords

Showing 1-10 of 24 results. Next

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

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