A181294 - cp's OEIS frontend

A181294 Number of 0's in all 2-compositions of n. A 2-composition of n is a nonnegative matrix with two rows, such that each column has at least one nonzero entry and whose entries sum up to n.

n	a(n)
0	0
1	2
2	10
3	46
4	198
5	816
6	3264
7	12776
8	49192
9	186976
10	703328
11	2623072
12	9712864
13	35746816
14	130873088
15	476961920
16	1731331200
17	6262393344
18	22580421120
19	81188953600
20	291176175104
21	1041867493376
22	3720118018048
23	13257657264128

[0, 2, 10, 46, 198, 816, 3264, 12776, 49192, 186976, 703328, 2623072, 9712864, 35746816, 130873088, 476961920, 1731331200, 6262393344, 22580421120, 81188953600, 291176175104, 1041867493376, 3720118018048, 13257657264128]

cp's OEIS Frontend

A181294 Number of 0's in all 2-compositions of n. A 2-composition of n is a nonnegative matrix with two rows, such that each column has at least one nonzero entry and whose entries sum up to n.

Table of values

List of values