A163343 Central diagonal of A163334 and A163336.

0, 4, 8, 44, 40, 36, 72, 76, 80, 404, 400, 396, 360, 364, 368, 332, 328, 324, 648, 652, 656, 692, 688, 684, 720, 724, 728, 3644, 3640, 3636, 3600, 3604, 3608, 3572, 3568, 3564, 3240, 3244, 3248, 3284, 3280, 3276, 3312, 3316, 3320, 2996, 2992, 2988

Offset

0,2

Comments

It is easy to see by induction that these terms are always divisible by 4.

Links

Table of n, a(n) for n=0..47.

Formula

a(n) = 4*A163344(n).

a(n) = A163332(A338086(n)) = A338086(A128173(n)). - Kevin Ryde, Nov 06 2020

Prog

(PARI) a(n) = my(v=digits(n, 3), s=Mod(0, 2)); for(i=1, #v, if(s, v[i]=2-v[i]); s+=v[i]); fromdigits(v, 9)<<2; \\ Kevin Ryde, Nov 06 2020

Crossrefs

Cf. A163344 (quarter), A128173, A163332, A163334, A338086.

Peano curve axes: A163480, A163481.

Sequence in context: A111411 A137054 A338423 * A284972 A045639 A337782

Adjacent sequences: A163340 A163341 A163342 * A163344 A163345 A163346

Keyword

nonn

Author

Antti Karttunen, Jul 29 2009

Status

approved