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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.

A067119 a(n) = floor[X/Y] where X = concatenation of first n even numbers in increasing order and Y = n-th triangular number.

Table of values

n a(n)
1 2
2 8
3 41
4 246
5 16454
6 1175286
7 88146471
8 6855836706
9 548466936480
10 44874567530214
11 3739547294184576
12 316423232584848746
13 27121991364415606839
14 2350572584916019259453
15 205675101180151685202190

List of values

[2, 8, 41, 246, 16454, 1175286, 88146471, 6855836706, 548466936480, 44874567530214, 3739547294184576, 316423232584848746, 27121991364415606839, 2350572584916019259453, 205675101180151685202190]

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

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