A248894 - OEIS

A248894

Numbers k such that both numbers k and k+1 are in the sequence A248903.

17, 69, 70, 241, 405, 2606, 3339, 4116, 7116, 15148, 15149, 20162, 137633, 324410, 332504, 439298, 1012547, 1121608, 2482209, 5028662, 6330857, 7180864, 7180865, 9569168, 14452770, 17021632, 110229972, 110229973, 193329301

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OFFSET

1,1

COMMENTS

If k is in the set {69, 15148, 7180864, 110229972, ...} then both numbers k and k+1 are in the sequence. This means that k, k+1 and k+2 are in the sequence A248903. It seems that there exist more such numbers k.

LINKS

Table of n, a(n) for n=1..29.

CROSSREFS

Cf. A001359, A248891, A248903.

Sequence in context: A294516 A209078 A244630 * A041556 A041558 A327495

Adjacent sequences: A248891 A248892 A248893 * A248895 A248896 A248897

KEYWORD

nonn,more

AUTHOR

Jahangeer Kholdi and Farideh Firoozbakht, Nov 22 2014

EXTENSIONS

a(13)-a(29) from Jinyuan Wang, Nov 28 2020

STATUS

approved