A280742 Position where n-th prime appears in A280864.

2, 4, 7, 11, 14, 23, 24, 28, 31, 39, 49, 55, 63, 66, 70, 87, 91, 95, 104, 121, 128, 132, 136, 140, 145, 149, 162, 166, 186, 198, 212, 256, 259, 262, 263, 276, 287, 291, 301, 312, 320, 331, 335, 351, 355, 359, 368, 376, 380, 400, 415, 421, 428, 444, 448, 454

Offset

1,1

Comments

a(n) is the index k such that A280864(k) = prime(n). For the smallest k such that prime(n) divides A280864(k), see A397166. Obviously A397166(n) <= a(n). - N. J. A. Sloane, Jun 17 2026

This sequence is very similar to A372058, the difference being caused by the presence of 1 and 25 in A372059. - N. J. A. Sloane, Jun 06 2024

Links

David Suteu and N. J. A. Sloane, Table of n, a(n) for n = 1..5175 [First 679 terms from David Suteu]

Crossrefs

Cf. A280864, A280741, A280745, A372058, A372059, A397166.

Sequence in context: A018385 A361004 A372058 * A087163 A062467 A250621

Adjacent sequences: A280739 A280740 A280741 * A280743 A280744 A280745

Keyword

nonn

Author

N. J. A. Sloane, Jan 12 2017

Extensions

a(9) inserted and terms a(11) and beyond added by Daniel Suteu, Jan 13 2017

Status

approved