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 1-3 of 3 results.

A297188 Sums of antidiagonals in A297359.

Original entry on oeis.org

1, 2, 4, 8, 18, 34, 68, 140, 280, 556, 1114, 2232, 4468, 8932, 17860, 35718, 71446, 142900, 285800, 571592, 1143174, 2286348, 4572708, 9145434, 18290876, 36581744, 73163470, 146326928, 292653860, 585307730, 1170615490, 2341231006, 4682462012, 9364923998
Offset: 1

Views

Author

N. J. A. Sloane, Dec 31 2017

Keywords

Links

Crossrefs

Cf. A297359.

Programs

  • PARI
    See Links section.

Extensions

More terms from Rémy Sigrist, Nov 30 2020

A297495 Triangle T(n,k) (n>=0, 0<=k<=n) read by rows: use T(n,k)=T(n,k-1)+T(n-1,k-1) rule except left edge is the sequence read by rows, initial values are T(0,0)=T(1,0)=1.

Original entry on oeis.org

1, 1, 2, 2, 3, 5, 2, 4, 7, 12, 3, 5, 9, 16, 28, 5, 8, 13, 22, 38, 66, 2, 7, 15, 28, 50, 88, 154, 4, 6, 13, 28, 56, 106, 194, 348, 7, 11, 17, 30, 58, 114, 220, 414, 762, 12, 19, 30, 47, 77, 135, 249, 469, 883, 1645, 3, 15, 34, 64, 111, 188, 323, 572, 1041, 1924
Offset: 0

Views

Author

N. J. A. Sloane, Dec 31 2017

Keywords

Comments

Suggested by A297359.

Examples

			Triangle begins:
1,
1,2,
2,3,5,
2,4,7,12,
3,5,9,16,28,
5,8,13,22,38,66,
2,7,15,28,50,88,154,
4,6,13,28,56,106,194,348,
7,11,17,30,58,114,220,414,762,
12,19,30,47,77,135,249,469,883,1645,
3,15,34,64,111,188,323,572,1041,1924,3569,
5,8,23,57,121,232,420,743,1315,2356,4280,7849,
9,14,22,45,102,223,455,875,1618,2933,5289,9569,17418,
16,25,39,61,106,208,431,886,1761,3379,6312,11601,21170,38588,
28,44,69,108,169,275,483,914,1800,3561,6940,13252,24853,46023,84611,
...,

Links

Crossrefs

Cf. A297359, A297496 (right edge), A297497, A297498, A297186 (row sums).

Extensions

Terms a(21) and beyond from Lars Blomberg, Jan 01 2018

A297497 Triangle T(n,k) (n>=0, 0<=k<=n) read by rows: use T(n,k)=T(n,k-1)+T(n-1,k-1) rule except left edge is the sequence read by rows, initial values are T(0,0)=0, T(1,0)=1.

Original entry on oeis.org

0, 1, 1, 1, 2, 3, 1, 2, 4, 7, 2, 3, 5, 9, 16, 3, 5, 8, 13, 22, 38, 1, 4, 9, 17, 30, 52, 90, 2, 3, 7, 16, 33, 63, 115, 205, 4, 6, 9, 16, 32, 65, 128, 243, 448, 7, 11, 17, 26, 42, 74, 139, 267, 510, 958, 2, 9, 20, 37, 63, 105, 179, 318, 585, 1095, 2053, 3, 5, 14
Offset: 0

Views

Author

N. J. A. Sloane, Dec 31 2017

Keywords

Comments

Suggested by A297359.

Examples

			Triangle begins:
0,
1,1,
1,2,3,
1,2,4,7,
2,3,5,9,16,
3,5,8,13,22,38,
1,4,9,17,30,52,90,
2,3,7,16,33,63,115,205,
4,6,9,16,32,65,128,243,448,
7,11,17,26,42,74,139,267,510,958,
2,9,20,37,63,105,179,318,585,1095,2053,
3,5,14,34,71,134,239,418,736,1321,2416,4469,
5,8,13,27,61,132,266,505,923,1659,2980,5396,9865,
9,14,22,35,62,123,255,521,1026,1949,3608,6588,11984,21849,
16,25,39,61,96,158,281,536,1057,2083,4032,7640,14228,26212,48061,
...

Links

Crossrefs

Cf. A297359, A297498 (right edge), A297495, A297496, A297187 (row sums).

Extensions

Terms a(28) and beyond from Lars Blomberg, Jan 01 2018
Showing 1-3 of 3 results.

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

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