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.

A059513 Variation of Boustrophedon transform applied to 1,1,1,1,... Fill an array by diagonals, in alternating directions. The first entry is 1 each time. For the next element of a diagonal, add to the previous element the elements of the row and the column the new element is in. The final element of each diagonal gives a(n).

Table of values

n a(n)
1 1
2 2
3 6
4 23
5 116
6 736
7 5659
8 50796
9 521040
10 6006587
11 76874524
12 1081439062
13 16586149365
14 275442822510
15 4924040788654

List of values

[1, 2, 6, 23, 116, 736, 5659, 50796, 521040, 6006587, 76874524, 1081439062, 16586149365, 275442822510, 4924040788654]

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

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