A244367 Main diagonal of A244580.

1, 2, 4, 6, 6, 8, 9, 12, 12, 15, 15, 16, 18, 20, 20, 24, 24, 25, 28, 28, 30, 30, 32, 35, 35, 36, 40, 40, 42, 42, 45, 45, 48, 48, 49, 50, 54, 54, 56, 56, 60, 60, 63, 63, 64, 66, 66, 70, 70, 72, 72, 72, 77, 77, 80, 80, 81, 84, 84, 88, 88, 90, 90, 91, 91

Offset: 1

Author

Omar E. Pol, Jul 05 2014

Keywords

• nonn

Comments

a(n) is the number associated to the n-th cell of the main diagonal in the diagram of the symmetry of sigma. For more information see A237593 and A237270.

Records give A071562.

First differences are A259179. - Omar E. Pol, Apr 21 2020

Links

• Rémy Sigrist, Table of n, a(n) for n = 1..10000
• Rémy Sigrist, PARI program for A244367

Crossrefs

Cf. A000203, A071562, A196020, A236104, A237270, A237271, A237593, A240542, A259179.

Programs

PARI

See Links section.