A330361 First occurrence of run of lucky numbers congruent to 3 mod 4 of exactly length n.

15, 3, 51, 1563, 211, 1123, 15511, 5487, 37195, 108963, 331527, 1493103, 1103307, 3248367, 46574499, 4814875, 14747343, 222808263, 446500987, 46936231, 228462727, 1003298383, 1705601667

Offset

1,1

Comments

Calculated using Hugo van der Sanden's Lucky numbers up to 10^9 (private communication).

a(24) > 4*10^9. - Giovanni Resta, May 10 2020

Links

Table of n, a(n) for n=1..23.

Amiram Eldar and Giovanni Resta, Table of n, k, A000959(k), ..., A000959(k+n-1) for n = 1..23

Example

a(1) = 15 since 15 is a lucky number congruent to 3 mod 4, following 13 and followed by 21 which are both not congruent to 3 mod 4.
a(2) = 3 since 3 and 7 are 2 consecutive lucky numbers congruent to 3 mod 4, following 1 and followed by 9 which are both not congruent to 3 mod 4.

Crossrefs

Cf. A000959, A055624, A137170, A330359, A330360.

Sequence in context: A256527 A040219 A317315 * A291157 A040216 A349710

Adjacent sequences: A330358 A330359 A330360 * A330362 A330363 A330364

Keyword

nonn,more

Author

Amiram Eldar, Dec 12 2019

Extensions

a(22)-a(23) from Giovanni Resta, May 10 2020

Status

approved