A079809 - cp's OEIS frontend

A079809 Consider a triangle in which the 2n-th row contains first 2n positive integers in increasing order and the (2n+1)-st row contains first 2n+1 positive integers in decreasing order; sequence contains concatenation of numbers read upward at a 45-degree angle.

n	a(n)
1	1
2	1
3	32
4	12
5	521
6	143
7	7234
8	1632
9	92541
10	18345
11	1127436
12	1103652
13	13294561
14	11238547
15	1521147638
16	1143105672
17	17213496581
18	11631258749
19	19215411678310
20	1183145107692
21	212174136985101
22	120316512789411
23	232194156118710312

[1, 1, 32, 12, 521, 143, 7234, 1632, 92541, 18345, 1127436, 1103652, 13294561, 11238547, 1521147638, 1143105672, 17213496581, 11631258749, 19215411678310, 1183145107692, 212174136985101, 120316512789411, 232194156118710312]

cp's OEIS Frontend

A079809 Consider a triangle in which the 2n-th row contains first 2n positive integers in increasing order and the (2n+1)-st row contains first 2n+1 positive integers in decreasing order; sequence contains concatenation of numbers read upward at a 45-degree angle.

Table of values

List of values