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 1-4 of 4 results.

A080317 a(n) = A007088(A080316(n)).

Original entry on oeis.org

0, 1100, 11001100, 11110000, 110011001100, 110011110000, 111111000000, 111100001100, 111100110000, 1100110011001100, 1100110011110000, 1100111111000000, 1100111100001100, 1100111100110000, 1111110000001100
Offset: 0

Views

Author

Antti Karttunen, Mar 02 2003

Keywords

Comments

Note that here we have totally balanced binary sequences (as in A014486/A063171), 10, 1010, 1100, 101010, 101100, 110010, ..., but with each bit duplicated. Furthermore, the order is a bit different.

A080313 Breadth-first-wise A014486-like encoding of A080299-trees.

Original entry on oeis.org

2, 56, 920, 992, 14744, 14816, 16256, 15896, 15968, 235928, 236000, 237440, 237080, 237152, 260120, 260192, 260480, 254360, 254432, 261632, 255872, 255512, 255584, 3774872, 3774944, 3776384, 3776024, 3776096, 3799064, 3799136, 3799424
Offset: 0

Views

Author

Antti Karttunen, Mar 02 2003

Keywords

Crossrefs

Same sequence in binary: A080314. Cf. A080312, A080315, A080316.

A083932 A014486-encoding of the Catalan mountain ranges with only even-length slopes allowed.

Original entry on oeis.org

0, 12, 204, 240, 3276, 3312, 3852, 3888, 4032, 52428, 52464, 53004, 53040, 53184, 61644, 61680, 62220, 62256, 62400, 64524, 64560, 64704, 65280, 838860, 838896, 839436, 839472, 839616, 848076, 848112, 848652, 848688, 848832, 850956, 850992
Offset: 0

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Author

Antti Karttunen, May 13 2003

Keywords

Comments

Subset of totally balanced binary strings (A014486) with only even runs of either bit 0 or 1 occurring. See A083933.

Links

Crossrefs

Same sequence in binary: A083933, indices to A014486: A083934.
Permutation of A080316 from which this differs first time at the sixth term, with a(6)=3852, while A080316(6)=4032.

Formula

a(n) = A008585(A083931(n)), i.e. 3*A083931(n).

A080315 a(n) = A080313(n)/2.

Original entry on oeis.org

1, 28, 460, 496, 7372, 7408, 8128, 7948, 7984, 117964, 118000, 118720, 118540, 118576, 130060, 130096, 130240, 127180, 127216, 130816, 127936, 127756, 127792, 1887436, 1887472, 1888192, 1888012, 1888048, 1899532, 1899568, 1899712
Offset: 0

Views

Author

Antti Karttunen, Mar 02 2003

Keywords

Crossrefs

Cf. A080316, A080317.
Showing 1-4 of 4 results.

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

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