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

0,1

Comments

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

Links

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

Example

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

Crossrefs

Cf. A000319, A381231.

Sequence in context: A057401 A308236 A019134 * A167298 A242838 A304878

Adjacent sequences: A381227 A381228 A381229 * A381231 A381232 A381233

Keyword

nonn

Author

N. J. A. Sloane, Feb 28 2025

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

Status

approved