A085180 Array A(x,y) giving the position of the y-th x in A007001 listed by rising antidiagonals.

1, 2, 3, 5, 4, 6, 14, 10, 7, 8, 42, 28, 13, 9, 11, 132, 84, 37, 19, 12, 15, 429, 264, 112, 41, 24, 16, 17, 1430, 858, 354, 126, 56, 27, 18, 20, 4862, 2860, 1155, 402, 131, 70, 33, 21, 22, 16796, 9724, 3861, 1320, 422, 174, 79, 36, 23, 25, 58786, 33592, 13156, 4433

Offset: 1

Author

Antti Karttunen, Jun 18 2003

Keywords

• nonn
• tabl

Comments

Read by upwards antidiagonals as A(1,1), A(2,1), A(1,2), A(3,1), A(2,2), A(1,3), etc.

Examples

			In A007001 each n occurs for the first time at position Cat(n), thus A(x,1) (the first row) is A000108.
		

Links

• Index entries for sequences that are permutations of the natural numbers

Crossrefs

Variant: A085178.

Inverse permutation: A085181.

First row: A000108, second row: A068875 apart from initial terms, first column: A085197, central diagonal: A001453.