1,2

As a sequence, this is a permutation of the natural numbers. Row 1 is A002522 (n^2 + 1); main diagonal is A000290 (n^2); column 1 is A010000 (n^2 + 2).

Table of n, a(n) for n=1..71.

Northwest corner:

1 2 5 10

3 4 8 13

6 7 9 15

11 12 14 16

Cf. A097291, A097292.

Sequence in context: A085181 A268129 A185725 * A114744 A096114 A121664

Adjacent sequences: A097344 A097345 A097346 * A097348 A097349 A097350

nonn,tabl

Clark Kimberling, Aug 06 2004

approved