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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.

A195136 a(n) = ((n+1)^(n-1) + (n-1)^(n-1))/2 for n>=1.

Table of values

n a(n)
1 1
2 2
3 10
4 76
5 776
6 9966
7 154400
8 2803256
9 58388608
10 1372684090
11 35958682112
12 1038736032324
13 32805006411776
14 1124535087475814
15 41584800431742976
16 1650158470945337584
17 69943137585151901696
18 3153813559835569475058
19 150745204037648268787712
20 7613458147995669857352380
21 405143549343202022103973888
22 22657085569540734204315357022
23 1328470689420203636727039918080
24 81494507575933974604289943213096
25 5220210773193749540624447754469376
26 348542314841685116176787263033063466
27 24216786265392720787141148530274467840
28 1748280517106781152846793195054531026356
29 130956723831431687431286364126682302906368
30 10164786953127554557192799138093559445158870

List of values

[1, 2, 10, 76, 776, 9966, 154400, 2803256, 58388608, 1372684090, 35958682112, 1038736032324, 32805006411776, 1124535087475814, 41584800431742976, 1650158470945337584, 69943137585151901696, 3153813559835569475058, 150745204037648268787712, 7613458147995669857352380, 405143549343202022103973888, 22657085569540734204315357022, 1328470689420203636727039918080, 81494507575933974604289943213096, 5220210773193749540624447754469376, 348542314841685116176787263033063466, 24216786265392720787141148530274467840, 1748280517106781152846793195054531026356, 130956723831431687431286364126682302906368, 10164786953127554557192799138093559445158870]

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

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