A381230 Index of first occurrence of n in A000319, or -1 if n never appears there.

6, 0, 17, 45, 13, 42, 938, 920, 57403, 7865, 15862, 313445, 54988, 53976, 57573, 61372, 83445, 14998, 360213, 57322, 59858, 2070497, 2021631, 14918, 58001, 1394543, 79664, 2056395, 85989, 11, 8, 71662, 5495575, 5652770, 360110, 2070250, 5947332, 5514279, 5514772, 2015129, 78877, 305403, 1031, 1869352, 5652707, 4823241

Offset: 0

Author

N. J. A. Sloane, Feb 28 2025

Keywords

• nonn

Comments

If a(57) is not -1, then a(57) > 14333074. - Tim Peters, Mar 13 2025

Examples

			0 is the 6th term of A000319, so a(0) = 6. 1 is the 0th term, so a(1) = 0.
		

Links

• Tim Peters, Table of n, a(n) for n = 0..56

Crossrefs

Cf. A000319, A381231.

Extensions

a(8)-a(10) from Hugo Pfoertner, Feb 28 2025

a(11)-a(31) from Tim Peters, Mar 01 2025

a(32) from Tim Peters, Mar 02 2025

a(33)-a(45) from Tim Peters, Mar 04 2025