A304780 - cp's OEIS frontend

A304780 Consider a triangle whose first row is {1,2} and, for n > 1, has as its n-th row the integers k through 2k where k is the sum of the numbers in the (n-1)th row. Then a(n) is the first number in the n-th row.

n	a(n)
1	1
2	3
3	18
4	513
5	395523
6	234658258578
7	82596747478641253260993
8	10233334041075645341729789249315281196742910563
9	157081688394356396673208173772909833928515988895188885472258972148661958252271815996039831298

[1, 3, 18, 513, 395523, 234658258578, 82596747478641253260993, 10233334041075645341729789249315281196742910563, 157081688394356396673208173772909833928515988895188885472258972148661958252271815996039831298]

cp's OEIS Frontend

A304780 Consider a triangle whose first row is {1,2} and, for n > 1, has as its n-th row the integers k through 2k where k is the sum of the numbers in the (n-1)th row. Then a(n) is the first number in the n-th row.

Table of values

List of values