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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.

A200540 Product of Pell and Motzkin numbers: a(n) = A000129(n+1)*A001006(n).

Table of values

n a(n)
0 1
1 2
2 10
3 48
4 261
5 1470
6 8619
7 51816
8 318155
9 1985630
10 12561308
11 80360280
12 519013571
13 3379514970
14 22161470850
15 146227235904
16 970126550763
17 6467496499590
18 43304243215638
19 291087137589552
20 1963598081845335
21 13288619577124122
22 90195242361688863
23 613843707553183800

List of values

[1, 2, 10, 48, 261, 1470, 8619, 51816, 318155, 1985630, 12561308, 80360280, 519013571, 3379514970, 22161470850, 146227235904, 970126550763, 6467496499590, 43304243215638, 291087137589552, 1963598081845335, 13288619577124122, 90195242361688863, 613843707553183800]

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

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