A309202 Peter Munn showed in A111273 that if A111273(n)=m then if m is odd, n <= m, and if m is even, n <= 2*m-1; a(n) is either m-n or 2*m-1-n in the two cases.

0, 1, 0, 1, 10, 1, 0, 3, 0, 1, 32, 1, 78, 7, 0, 1, 34, 1, 0, 7, 12, 1, 0, 15, 0, 1, 8, 1, 58, 1, 0, 15, 154, 1, 24, 1, 666, 1, 12, 1, 82, 1, 128, 1, 24, 1, 140, 7, 0, 25, 16, 1, 106, 1, 32, 19, 0, 1, 176, 1, 1830, 1, 0, 15, 0, 1, 200, 23, 36, 1, 0, 1, 2628, 37, 24, 1, 66, 1, 236, 27, 0, 1, 0, 55, 0, 43

Offset: 1

Author

N. J. A. Sloane, Jul 26 2019

Keywords

• nonn

Comments

It is known that if p is an odd prime, a(p-1) = 1 (see A111273).

Crossrefs

Cf. A111273.