A373807 - OEIS

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A373807

Indices of prime terms in A373805.

2, 4, 8, 10, 13, 15, 17, 23, 25, 27, 37, 41, 46, 48, 50, 52, 55, 57, 60, 62, 64, 74, 76, 79, 81, 83, 88, 90, 92, 94, 97, 99, 115, 117, 119, 124, 129, 133, 138, 141, 153, 156, 163, 166, 171, 173, 175, 179, 181, 183, 205, 207, 219, 224, 226, 236, 240, 245, 247, 250, 254, 258, 276, 278, 281, 283

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Please see the comments on A373805 and A373806 for further information.

a(608) > 65536. - Michael De Vlieger, Aug 12 2024

LINKS

Michael De Vlieger, Table of n, a(n) for n = 1..607 (First 319 terms from N. J. A. Sloane)

MATHEMATICA

nn = 2^14; s = j = 1; Reap[Monitor[Do[If[PrimeQ[j], Sow[n - 1]; s = -s; k = Prime[n] + s, k = 2 j + s]; j = k, {n, 2, nn}], n] ][[-1, 1]] (* Michael De Vlieger, Aug 12 2024 *)

PROG

(Python) # uses imports and A373805_gen in A373805

def agen(): # generator of terms

yield from (i for i, ai in enumerate(A373805_gen(), 1) if isprime(ai))

print(list(islice(agen(), 66))) # Michael S. Branicky, Aug 12 2024

CROSSREFS

Cf. A373805, A373806.

Sequence in context: A154788 A219617 A100278 * A075333 A297250 A014190

Adjacent sequences: A373804 A373805 A373806 * A373808 A373809 A373810

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Aug 11 2024.

STATUS

approved