A079808 - cp's OEIS frontend

A079808 Consider a triangle in which the 2n-th row contains first 2n positive integers in decreasing order and the (2n+1)-st row contains first 2n+1 positive integers in increasing order; sequence contains concatenation of numbers read upward at a 45-degree angle.

n	a(n)
1	1
2	2
3	11
4	42
5	133
6	622
7	1531
8	8244
9	17335
10	102642
11	193551
12	1228446
13	11137537
14	142104662
15	113395571
16	1621248648
17	11531157739
18	182144106682
19	117313597591
20	20216412688410
21	119315511779311
22	2221841461086102
23	1213175137995111

[1, 2, 11, 42, 133, 622, 1531, 8244, 17335, 102642, 193551, 1228446, 11137537, 142104662, 113395571, 1621248648, 11531157739, 182144106682, 117313597591, 20216412688410, 119315511779311, 2221841461086102, 1213175137995111]

cp's OEIS Frontend

A079808 Consider a triangle in which the 2n-th row contains first 2n positive integers in decreasing order and the (2n+1)-st row contains first 2n+1 positive integers in increasing order; sequence contains concatenation of numbers read upward at a 45-degree angle.

Table of values

List of values