A068052 - cp's OEIS frontend

A068052 Start from 1, shift one left and sum mod 2 (bitwise-XOR) to get 3 (11 in binary), then shift two steps left and XOR to get 15 (1111 in binary), then three steps and XOR to get 119 (1110111 in binary), then four steps and so on.

n	a(n)
0	1
1	3
2	15
3	119
4	1799
5	59367
6	3743271
7	481693095
8	123123509927
9	62989418816679
10	64491023022979239
11	132015402419352060071
12	540829047855347718631591
13	4430403202865824763042320551
14	72583450474242118015031400337575
15	2378466805556971511916001231449723047

[1, 3, 15, 119, 1799, 59367, 3743271, 481693095, 123123509927, 62989418816679, 64491023022979239, 132015402419352060071, 540829047855347718631591, 4430403202865824763042320551, 72583450474242118015031400337575, 2378466805556971511916001231449723047]

cp's OEIS Frontend

A068052 Start from 1, shift one left and sum mod 2 (bitwise-XOR) to get 3 (11 in binary), then shift two steps left and XOR to get 15 (1111 in binary), then three steps and XOR to get 119 (1110111 in binary), then four steps and so on.

Table of values

List of values