A028307 - cp's OEIS frontend

A028307 Form a triangle with n numbers in top row; all other numbers are the sum of their parents. E.g.: 4 1 2 7; 5 3 9; 8 12; 20. The numbers must be positive and distinct and the final number is to be minimized. Sequence gives final number.

n	a(n)
1	1
2	3
3	8
4	20
5	43
6	98
7	212
8	465
9	1000
10	2144
11	4497
12	9504
13	19872
14	41455
15	85356
16	178630
17	363467
18	757085
19	1541998
20	3183600
21	6515066
22	13357593
23	27432649
24	55914902
25	114683858
26	233517515
27	478061719
28	972479046
29	1986013932

[1, 3, 8, 20, 43, 98, 212, 465, 1000, 2144, 4497, 9504, 19872, 41455, 85356, 178630, 363467, 757085, 1541998, 3183600, 6515066, 13357593, 27432649, 55914902, 114683858, 233517515, 478061719, 972479046, 1986013932]

cp's OEIS Frontend

A028307 Form a triangle with n numbers in top row; all other numbers are the sum of their parents. E.g.: 4 1 2 7; 5 3 9; 8 12; 20. The numbers must be positive and distinct and the final number is to be minimized. Sequence gives final number.

Table of values

List of values