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.

A302277 Number of n X 7 0..1 arrays with every element equal to 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 8
2 98
3 363
4 1621
5 14125
6 72083
7 384916
8 3027442
9 17837758
10 105323556
11 739401390
12 4650704407
13 28941532526
14 193466816941
15 1245437720868
16 7947521451749
17 52140138010011
18 338093540539006
19 2181939290185486
20 14220546200647229

List of values

[8, 98, 363, 1621, 14125, 72083, 384916, 3027442, 17837758, 105323556, 739401390, 4650704407, 28941532526, 193466816941, 1245437720868, 7947521451749, 52140138010011, 338093540539006, 2181939290185486, 14220546200647229]

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

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